-
Anatomical and physiological considerations in scleral lens wear: Eyelids and tear film Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2021-01-16 Maria K. Walker; Muriel M. Schornack; Stephen J. Vincent
Scleral lenses can affect a range of anterior segment structures including the eyelids and the tears. The eyelids, consisting of the outer skin layer, the middle tarsal plate, and the posterior palpebral conjunctiva, provide physical protection and house the meibomian glands and cilia which have important and unique functions. Tears consist of a mix of aqueous, mucus, and lipidomic components that
-
Prevalence and associated risk factors of symptomatic dry eye in Ghana: A cross-sectional population-based study Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2021-01-16 Emmanuel Kobia-Acquah; Stephen Ankamah-Lomotey; Ebenezer Owusu; Sedinam Forfoe; Joseph Bannor; Joana Abokoma Koomson; Martin Opoku; Daniel Mensah Dzikpo; Derrick Nii Okaikwei Mensah; Jedidiah N. Amonoo; Prince Kwaku Akowuah
Purpose This study sought to estimate the prevalence and associated risk factors of symptomatic dry eye in the general non-clinical Ghanaian population. Methods This was a cross-sectional population-based study conducted from November 2019 to February 2020. A stratified, multistage, random sampling technique was used to select participants aged 18 years and above from the capital cities of eight administrative
-
Determining the spectral transmittance of photochromic contact lenses Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2021-01-15 Emmanuel B. Alabi; Trefford L. Simpson; Tyler Harris; Keith Whitten
Purpose This study evaluates the spectral transmission of photochromic contact lenses. Method A custom built photochromic filter transmission testing device (ICS photochromic bench) was developed to measure the spectral transmission of light adaptive filters. The spectral properties of seven contact lenses were measured using the ICS photochromic bench at 23⁰C and 35⁰C in their exposed (darkening)
-
Assessment of contact lens wearers' attitude toward contact lens wear and care during Coronavirus Disease 2019 (COVID-19) pandemic: A cross-sectional online survey Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2021-01-14 May M. Bakkar; Eman A. Alzghoul
Aim COVID-19 is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Several reports have provided conflicting recommendations regarding contact lenses (CL) use during COVID-19, causing confusion among CL wearers. The aim of this study is to assess CL wearers’ attitudes toward CL wear and care during COVID-19 pandemic. Methods A web-based cross-sectional online survey was used to
-
Optimizing correction of coma aberration in keratoconus with a novel soft contact lens Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2021-01-10 Asaki Suzaki; Shizuka Koh; Naoyuki Maeda; Sanae Asonuma; Jacinto Santodomingo-Rubido; Yoshinori Oie; Takeshi Soma; Takashi Fujikado; Kohji Nishida
Purpose To report on a second-generation prototype contact lens (modified lens) with enhanced optics to correct coma aberration and compare its performance with that of the prototype contact lens (conventional lens) used to optimise correction of coma aberration in keratoconus (KC). Methods Both lenses were designed as a set of standardised soft contact lenses (SCLs) with asymmetric powers along the
-
Variation in sag values in daily disposable, reusable and toric soft contact lenses Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2021-01-08 Eef van der Worp; Matthew Lampa; Beth Kinoshita; Mari J. Fujimoto; Benjamin J. Coldrick; Patrick Caroline
Purpose While knowledge of the ocular surface sagittal height (OC-SAG) is increasing with newer instrumentation, understanding of soft lens sag values (CL-SAG) in daily clinical practice is limited. This study aimed to report the differences in CL-SAG of a large collection of daily disposable (DD), reusable (2-week and 4-week replacement) and toric lens designs. Methods 12 different spherical DD and
-
Associations with meibomian gland loss in soft and rigid contact lens wearers Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2021-01-07 Ibrahim Inan Harbiyeli; Banu Bozkurt; Elif Erdem; Hamide Gizem Özcan; Burcu Cam; Yasar Sertdemir; Meltem Yagmur
Purpose This study aimed to evaluate the structural changes in meibomian glands (MGs) and meibomian gland dysfunction (MGD)-associated ocular surface alterations in contact lens (CL) wearers. Methods This prospective, multi-center, cross-sectional study included 44 soft CL wearers, 21 rigid CL wearers, and 26 healthy non-wearers. After completing the Ocular Surface Disease Index (OSDI) questionnaire
-
Understanding clinical and immunological features associated with Pseudomonas and Staphylococcus keratitis Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-12-08 Gauri Shankar Shrestha; Ajay Kumar Vijay; Fiona Stapleton; Fiona L. Henriquez; Nicole Carnt
Pseudomonas aeruginosa and Staphylococcus aureus are the two dominant Gram-negative and -positive species, respectively, isolated from patients with contact lens-related bacterial keratitis. The clinical features of bacterial keratitis vary, such that timely differential diagnosis can be challenging, which may cause a delay in diagnosis resulting in poorer outcome. This review aims to explore the current
-
The contact Lens risk survey to assess risk of soft contact lens-related inflammatory events Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-12-04 Chandra V. Mickles; Beth T. Kinoshita; Dawn Lam; Heidi Wagner; Aaron B. Zimmerman; Luigina Sorbara; G. Lynn Mitchell; Bernard Rosner; Kathryn Richdale
Purpose To test the Contact Lens Assessment in Youth Contact Lens Risk Survey (CLRS) scoring algorithm in soft contact lens (SCL) wearers presenting with SCL-related adverse events and healthy matched controls. Methods This prospective case-control study compared CLRS responses in SCL wearers presenting with symptomatic red eyes (Cases) with age-, sex- and site-matched healthy SCL wearers (Controls)
-
Exploring non-adherence to contact lens wear schedule: Subjective assessments and patient related factors in children wearing single vision and myopia control contact lenses Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-12-04 Rebecca Weng; Thomas Naduvilath; Krupa Philip; Xiang Chen; Padmaja Sankaridurg
Purpose To determine factors associated with non-adherence to contact lens wear schedule involving single vision and myopia control contact lenses in children. Methods Data from 379 children enrolled in a prospective, double masked, randomized clinical trial, aged 8–13 years, cycloplegic spherical equivalent of -0.75 to -3.50D and wearing either: single vision silicone hydrogel (SiH) CL (control lens);
-
Acute corneal edema decades after penetrating keratoplasty for keratoconus in eyes wearing scleral contact lenses Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-11-05 Sofia E. Murillo; Ayesha Shariff; Jonathan H. Lass; Loretta B. Szczotka-Flynn
Purpose To report three cases of acute corneal edema occurring decades after penetrating keratoplasty (PK) for keratoconus in eyes wearing scleral contact lenses (ScCLs) with previously clear corneal grafts. Methods Retrospective chart review of three ScCL wearers presenting for sudden onset pain and blurred vision. Data extracted included clinical presentation, year and reason for PK, ocular medications
-
Effect of meibomian gland morphology on functionality with applied treatment Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2021-01-01 Paramdeep Bilkhu; Maria Vidal-Rohr; Sonia Trave-Huarte; James S. Wolffsohn
Purpose To determine how Meibomian gland (MG) morphology affects MG function by means of gland expression with the effect of treatment. Methods Fifteen patients (aged 31.6 ± 13.1 years) from a dry eye clinic diagnosed with MG dysfunction had their 365 lower lid MGs visualised with a slit-lamp biomicroscopy. Using infrared meibography (Oculus K5m), MG length, width and tortuosity were objectively measured
-
Daily Disposable Contact Lens use in Adolescents and its Short-term Impact on Self-Concept Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-12-26 Didem Dizdar Yigit; Semra Akkaya Turhan; Ebru Toker
Objective To determine the short-term effect of contact lens (CL) wear on the self-concept of adolescents. Methods In this open-label trial, first-time CL wearing adolescents were prescribed Delefilcon A (DAILIES TOTAL1,® Alcon, USA) daily disposable CL. To determine the self-concept level of the subjects at dispensing and after one month, the Turkish adapted version of the Piers-Harris Children’s
-
Non-contact specular microscopy with Topcon instruments to assess central corneal thickness of healthy human eyes – A 20 year review Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-12-16 M.J. Doughty
Background The purpose of this review was to evaluate the consistency of central corneal thickness (CCT) values reported with use of Topcon SP-2000 P and SP-3000 P non-contact specular microscopes since their introduction in 1999 with the two microscopes having been commonly used in a wide range of studies. Methods As a primary resource, PubMed was used to search for peer-reviewed articles in any language
-
Application of systane complete for the treatment of contact lens discomfort Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-12-13 Andrew D. Pucker; Gerald McGwin; Quentin X. Franklin; Jyoti Dubey; Alanna Nattis; Chris Lievens
Purpose To understand the safety of treating contact lens (CL) discomfort with a new artificial tear when it is directly applied to a CL-wearing eye. Methods This was a two-week, two-visit, double-masked study that randomized participants with CL discomfort to use Systane Complete (artificial tear), Sensitive Eyes (rewetting drop), or no treatment. Drops were applied before, twice during, and after
-
The association of comfort and vision in soft toric contact lens wear Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-12-09 Carole Maldonado-Codina; Maria Navascues Cornago; Michael L. Read; Andrew J. Plowright; Jose Vega; Gary N. Orsborn; Philip B. Morgan
Purpose This work set out to investigate if there was an association between subjective comfort and both subjective and measured vision during the use of contemporary daily disposable soft toric contact lenses. Methods Thirty-eight habitual soft contact lens wearers wore each of three daily disposable toric lenses for one week in a prospective, crossover, randomised, single-masked study. The following
-
Clinical significance of contact lens related changes of ocular surface tissue observed on optical coherence images Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-12-05 Alexandra Jandl; Thomas Ruland; David Schwarz; James S. Wolffsohn; Heiko Pult; Stefan Bandlitz
Purpose To investigate the relationship between the real contact lens imprint into the conjunctival tissue, observed by optical coherence tomography (OCT) and conjunctival staining and contact lens wearing comfort. Methods 17 participants (mean age = 26.6 SD ± 3.6 years; 7 females) were fitted with three different contact lenses base curves of the same silicone hydrogel custom lens type (Visell 50;
-
Development of a contact Lens risk survey Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-12-03 G. Lynn Mitchell; Kathryn Richdale; Dawn Lam; Heidi Wagner; Beth T. Kinoshita; Aaron B. Zimmerman; Luigina Sorbara; Bernard Rosner
Purpose To describe the development and report psychometric properties of the Contact Lens Risk Survey (CLRS) to identify patients at risk for soft contact lens-related complications. Methods Psychometric properties of the CLRS, a web-based survey with branching logic, were determined using data from 5 multi-site fieldings (n = 1059), including re-fielding to sub groups. Responses from participants
-
Intrasession repeatability of corneal, limbal and scleral measurements obtained with a fourier transform profilometer Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-11-23 Laurent Bataille; Ainhoa Molina-Martin; David P Piñero
Purpose To evaluate the intrasession repeatability of corneal, limbal and scleral measurements obtained by an experienced operator with a Fourier transform profilometer in healthy eyes. Methods Prospective, single-center study including 35 eyes of 35 participants with ages ranging from 13 to 52 years. All patients underwent three consecutive corneoscleral topographic evaluations with the Eye Surface
-
Visual function, ocular surface integrity and symptomatology of a new extended depth-of-focus and a conventional multifocal contact lens Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-11-23 Irene Martínez-Alberquilla; María García-Montero; Javier Ruiz-Alcocer; Almudena Crooke; David Madrid-Costa
Purpose To evaluate visual function, ocular surface integrity and dry eye symptoms with an extended depth-of-focus (EDOF) design and a conventional multifocal (MF) contact lens (CL) after 15 days of wear. Methods A crossover single mask randomised clinical trial was conducted including 30 presbyopes who used an EDOF and a conventional MF CL (Biofinity MF) for 15 days each. Defocus curves, depth-of-focus
-
Multicenter review of impression-based scleral devices Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-11-13 Amy Nau; Ellen S. Shorter; Jennifer S. Harthan; Jennifer S. Fogt; Cherie B. Nau; Muriel Schornack
Objective To describe outcomes using impression based-scleral devices for the management of anterior segment disease. Methods Retrospective chart review identified all patients who were fitted with impression-based scleral devices between January 1, 2013 and June 30, 2019 at three specialty contact lens practices. Patient demographic data, indication for device use, visual and physiological outcomes
-
Contact lens wear and care in Spain during the COVID-19 pandemic Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-11-11 Marta Vianya-Estopa; Nery Garcia-Porta; David P Piñero; Luisa Simo Mannion; Eldre Beukes; James S Wolffsohn; Peter M. Allen
Aim To establish contact lens wear and care practices during the COVID-19 pandemic in Spain. Method A 58-item anonymous online survey was distributed during the period 30th April to 10th May via Qualtrics. The survey explored: a) demographic characteristics (age, sex, general health and where they were living during lockdown), b) changes in their contact lens use during lockdown, c) hygiene and contact
-
Osmolality and pH of commercially available contact lens care solutions and eye drops Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-11-10 Hugo Pena-Verdeal; Jacobo Garcia-Queiruga; Carlos García-Resúa; Eva Yebra-Pimentel; María J. Giráldez
Purpose The physical properties of contact lens care solutions and Eye Drops (ED) may affect initial comfort and dry eye symptomatology in contact lens wearers, although these properties are not always provided by manufacturers. The present study aimed to measure and compare the osmolality and pH of commercially available contact lens care solutions and ED. Methods Forty-four solutions were tested
-
In-vitro dewetting properties of planned replacement and daily disposable silicone hydrogel contact lenses Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-10-25 Erol Havuz; Onur Gokmen
Aim To compare the in-vitro videokeratoscopic surface dewetting properties of new-generation silicone hydrogel (SiH) planned replacement contact lenses (CL) with those of daily disposable CLs. Method A chrome coated cornea model was used for the in-vitro evaluation of surface dewetting. Pre-lens and post-lens film layers were formed by instilling a normal preservative-free normal saline solution (PFNs)
-
Repeatability of corneal biomechanics waveform signal parameters derived from Ocular Response Analyzer in children Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-10-23 Kin Wan; Sin Wan Cheung; James Stuart Wolffsohn; Pauline Cho
Purpose To investigate the repeatability of waveform signal parameters, measured with the Ocular Response Analyzer (ORA), in children. Methods Two sets of ORA measurements, with a 10-min break between them, were performed on children, aged six to <11 years old, either wearing single-vision spectacles (SVS) or orthokeratology (ortho-k) lenses. Intraclass correlation coefficients (ICCs) were used to
-
Outcome, influence factor and development of CLS measurement in continuous IOP monitoring: A narrative review Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-10-19 Xiang Chen; Xingdi Wu; Xueqi Lin; Jingwen Wang; Wen Xu
A large fluctuation in intraocular pressure (IOP) and a high peak IOP remain the risk factors for progressive visual field loss in patients with glaucoma, which is a leading cause of irreversible blindness. However, IOP measurements during working time cannot provide sufficient information on IOP to guide clinicians in setting IOP target values. Contact lenses are extensively used in ophthalmology
-
Soft contact lens-induced corneal deformation in the posterior corneal surface Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-10-21 Motohiro Itoi; Motozumi Itoi
Objective This case report aims to highlight the corneal deformation induced by soft contact lens (SCL) wear, which is accompanied by changes in not only the anterior but also the posterior surface of cornea. Case Report Cases are presented of two patients who wore non- planned replacement SCL for more than 15 years fabricated from materials with low oxygen permeability, sought a consultation with
-
Does placebo effect exist in contact lens discomfort management? Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-10-16 Cristina Arroyo-del Arroyo; Andrea Novo-Diez; Marta Blanco-Vázquez; Itziar Fernández; Alberto López-Miguel; María Jesús González-García
Purpose To study the effect of daily disposable contact lens (DDCL) refitting in monthly contact lens (CL) wearers suffering from contact lens discomfort (CLD), and to assess if there is a placebo effect associated with this CLD intervention. Methods Symptomatic CL wearers, according to the Contact Lens Dry Eye Questionnaire 8 (CLDEQ-8 ≥ 12 points), were divided into two groups. The study group was
-
Lens fitting and subjective acceptance of senofilcon A with photochromic additive on a neophyte population Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-10-13 John R. Buch; Leilani Sonoda; Jessica L. Cannon
Purpose To determine the proportion of contact lens neophytes that can be successfully fitted with a photochromic contact lens, and to survey subjective performance outcomes compared to habitual spectacles. It was hypothesized that at least 50 % of lens fits would be successful. Methods Eleven sites enrolled contact lens neophytes with up-to-date spectacles. Subjects were fitted bilaterally with a
-
Structural changes associated to orthokeratology: A systematic review Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-10-10 Alicia Sánchez-García; Miguel A. Ariza; Phillippe Büchler; Ainhoa Molina-Martin; David P Piñero
Purpose To summarize the peer-reviewed literature on corneal structural changes after orthokeratology (OK) and to analyze the quality of the studies published. Methods An exhaustive search was carried out in the databases Pubmed MEDLINE, Web of Science and Scopus. Original studies in English, with a cohort or experimental design and analyzing the cellular and structural changes of the cornea after
-
Trajectories of myopia control and orthokeratology compliance among parents with myopic children Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-10-03 Li Chun Chang; Fu Jung Li; Chi Chin Sun; Li Ling Liao
Significance This study set out to illustrate the trajectories of myopia control in time sequence and explore orthokeratology compliance for parents with myopic children in the first fitting within one year. Profiling these results is crucial to improving myopia control and orthokeratology care. Purpose To obtain a better understanding of myopia control and orthokeratology care that could promote compliance
-
Conjunctival prolapse during open eye scleral lens wear Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-10-02 Damien Fisher; Michael J. Collins; Stephen J. Vincent
Purpose To investigate the incidence and peak elevation of conjunctival prolapse during short-term open eye scleral lens wear and its association with lens fitting characteristics. Methods Ten young, healthy adults (mean age ± SD, 30 ± 4 years) wore a high Dk sealed scleral lens for 90 min with an initial central post-lens fluid reservoir thickness defined as low (144 ± 23 μm), medium (487 ± 63 μm)
-
Current U.S. based optometric scleral lens curricula and fitting recommendations: SCOPE educators survey. Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-09-18 Jennifer S Harthan,Muriel Schornack,Cherie B Nau,Amy C Nau,Jennifer S Fogt,Ellen S Shorter
Objectives To describe current components of scleral lens curricula at U.S. based optometry colleges and universities. Methods Contact lens educators were surveyed between June 2019 and August 2019 regarding their optometric scleral lens curriculum. Respondents were asked to describe their experience and involvement in optometric scleral lens education as well as to describe components of scleral lens
-
Changes in the expression of matrix metalloproteinase-9 after intense pulsed light therapy combined with meibomian gland expression in moderate and severe meibomian gland dysfunction. Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-09-15 Hun Lee,Ye Eun Han,So Young Park,Jae Hyuck Lee,Ho Seok Chung,Su Young Moon,Jae Yong Kim,Hungwon Tchah
Purpose To evaluate the combined effect of intense pulsed light (IPL) therapy and meibomian gland expression on extracellular matrix metalloproteinase-9 (MMP-9) levels and clinical outcomes of moderate and severe meibomian gland dysfunction (MGD) treatment. Methods This retrospective study was conducted on 45 eyes of 23 patients with moderate and severe MGD. Each eye underwent three IPL sessions and
-
Scleral shape and its correlation with corneal parameters in keratoconus. Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-09-13 Siska E Dhaese,Elke O Kreps,Alejandra Consejo
Purpose To assess the correlation of the scleral shape and corneal tomographic parameters in keratoconus. Methods Twenty eyes of 15 keratoconus patients with no previous specialty lens wear or ocular surgery were included in this study. Corneal imaging was obtained with the Pentacam HR and three-dimensional (3D) corneoscleral maps were acquired using the Eye Surface Profiler, ESP. Sagittal height was
-
Ocular symptoms associated with digital device use in contact lens and non-contact lens groups. Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-09-11 Dawn Meyer,Martin Rickert,Pete Kollbaum
Purpose Previous reports indicate that “eye fatigue” occurs in roughly 60 % of the adult population using digital devices and may negatively impact quality of life. However, the construct of eye fatigue remains poorly understood. The goal of this study was to quantify the relationship among symptoms most frequently associated with eye fatigue in those using digital devices. Methods Six hundred and
-
Evaluating the diagnostic ability of two automated non-invasive tear film stability measurement techniques. Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-09-10 Joevy Lim,Michael T M Wang,Jennifer P Craig
Purpose To evaluate the comparability, discriminative ability, and optimal thresholds for non-invasive tear film breakup time measurements obtained from the Oculus Keratograph 5M and Medmont E300 in detecting other signs and symptoms of dry eye disease, as defined by the TFOS DEWS II diagnostic criteria. Methods One hundred and thirty-four participants (53 male, 81 female), with a mean ± SD age of
-
The safety of orthokeratology in myopic children and analysis of related factors. Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-09-08 Peike Hu,Yingying Zhao,Duya Chen,Hailong Ni
Objective To evaluate the safety of overnight orthokeratology (OK) wear and explore whether factors such as age, refraction and allergic conjunctivitis (AC) history were associated with corneal adverse events (AEs) incidence. Methods Medical records of consecutive patients who started OK for myopia correction and continued for more than one year were retrospectively reviewed. Clinical data including
-
Effect of large diameter and plasma coating on the initial adaptation of gas permeable contact lens fitting for neophytes. Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-09-08 Dutta Debarun,James S Wolffsohn
Purpose To determine whether the adaption of neophytes to rigid gas permeable lenses (GPs) could be accelerated by changing their diameter or surface lubricity. Methods This was a 2 part prospective double-masked randomised wear study. An GP lens (Roflufocon D material, 9.6 mm diameter) with and without a Hydrapeg plasma coating surface was worn by 119 neophytes (21.1 ± 3.5 years; 77% female) on separate
-
Temporal considerations in contact lens discomfort. Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-08-29 Eric B Papas,Annie Chiem,George Zhang,Rabia Mobeen,Ling Lee
Purpose To determine the relative contributions to perceived discomfort during contact lens wear of contact time with the lens and the time of day at which wear begins, using a wearing framework similar to that of regular users. Methods Twenty-three participants reported ocular discomfort using a 1–100 visual analogue rating scale, when prompted by email, during one day without contact lenses and on
-
Anterior eye shape in emmetropes, low to moderate myopes, and high myopes. Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-08-21 Hamed Niyazmand,Scott A Read,David A Atchison,Michael J Collins
Purpose Myopia prevalence has increased in recent years, including the levels of high myopia. While myopia has been associated with scleral remodelling and changes in posterior scleral shape, there has been little research examining how myopia affects in-vivo anterior sclera shape. We compared anterior scleral shape in emmetropes, low to moderate myopes, and high myopes. Methods In this prospective
-
Fluid reservoir thickness and corneal oedema during closed eye scleral lens wear. Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-08-19 Damien Fisher,Michael J Collins,Stephen J Vincent
Purpose To examine the relationship between central post-lens fluid reservoir thickness and central corneal oedema during short-term closed eye scleral lens wear, and to compare these empirical oedema measurements with open eye lens wear data and current theoretical modelling for overnight scleral lens wear. Methods Ten participants (mean ± standard error 30 ± 1 years) with normal corneas wore scleral
-
In vivo efficacy of silver-impregnated barrel contact lens storage cases. Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-08-15 Ananya Datta,Mark D P Willcox,Fiona Stapleton
Purpose This study examined the rate and level of microbial contamination of silver and non-silver (control) barrel contact lens storage cases in vivo. Methods A prospective, single-centre, randomized, double blinded, crossover study was conducted to evaluate the efficacy of silver and control barrel cases used with an Oxipol™-based disinfecting solution over a two-month period. Lens cases were collected
-
Soft contact lens wearers' compliance during the COVID-19 pandemic. Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-08-14 Marta Vianya-Estopa,James S Wolffsohn,Eldre Beukes,Mike Trott,Lee Smith,Peter M Allen
Aim Contact lens wearers need to maintain optimal hygiene practices during the COVID-19 pandemic to minimise contact-lens complications including microbial keratitis and corneal infiltrative events. This online survey (UK and Ireland) explored contact lens wearers’ compliance behaviours, attitudes and concerns during the pandemic. Method The 60-item anonymous online survey was distributed during a
-
Antibiotic eye drops prescription patterns by orthokeratology practitioners in China and the development of antibiotic usage guidelines. Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-08-11 Zhi Chen,Jun Jiang,Jingjing Xu,Xiao Yang,Yin Yang,Kai Wang,Hongxin Song,Bi Yang,Pauline Cho
Purpose To investigate antibiotic eye drops prescribing patterns of contact lens practitioners in Mainland China for orthokeratology (ortho-k) patients and to develop guidelines for their use. Methods A questionnaire on their antibiotic prescribing habits was administered to eye care practitioners (ECP) involved in ortho-k lens fitting nationwide via an official online account. Multiple logistic regression
-
Antimicrobial susceptibility of isolated pathogens from patients with contact lens-related bacterial keratitis in Crete, Greece: A ten-year analysis. Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-08-08 Nikolaos Spernovasilis,Sofia Maraki,Evangelos Kokorakis,Diamantis Kofteridis,Miltiadis Tsilimbaris,Charalampos Siganos,George Samonis
Purpose To evaluate the bacterial spectrum and antimicrobial susceptibilities of pathogens isolated from contact lens-related bacterial keratitis cases in a large academic Greek hospital. Methods All adult patients with positive corneal scrapings or contact lens culture between 2007 and 2016 at the University Hospital of Heraklion, Greece, were retrospectively identified through a local microbiology
-
Toll-like receptor gene polymorphisms in patients with keratitis. Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-07-25 Nagaraju Konda,Inderjeet Kaur,Prashant Garg,Subhabrata Chakrabarti,Mark D P Willcox
Objective To investigate differences in SNPs in TLR genes between people who had keratitis and controls in an Indian population. Methods 145 cases of keratitis and 189 matched controls were recruited. DNA was extracted from peripheral blood. Single nucleotide polymorphisms (SNP) in TLR2 (n = 6), TLR4 (n = 15), TLR5 (n = 13) and TLR9 (n = 10) were analysed. The risk of developing keratitis was assessed
-
Influence of the COVID-19 pandemic on contact lens wear in Spain. Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-07-17 Diego García-Ayuso,Miguel Escámez-Torrecilla,Caridad Galindo-Romero,Francisco J Valiente-Soriano,Esmeralda Moya-Rodríguez,Paloma Sobrado-Calvo,Johnny Di Pierdomenico
Purpose To investigate the behaviour of contact lens (CL) wearers in Spain during the COVID-19 pandemic. Methods An anonymized web-based questionnaire was used to assess demographics, CL history, and activity, CL wear habits and perceived risk of infection due to CL wear during the COVID-19 pandemic. Results A total of 737 participants with an average age of 27.4 (±9.3) years completed the online questionnaire
-
Vision-related quality of life of Chinese children undergoing orthokeratology treatment compared to single vision spectacles. Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-07-13 Bi Yang,Xueqin Ma,Longqian Liu,Pauline Cho
Objective To measure and compare the vision-related quality of life between Chinese children wearing orthokeratology (ortho-k) lenses and single vision spectacles, to understand acceptance of ortho-k treatment by children in China. Methods Subjects of Chinese origin, with myopia of -5.00 to -0.75 D, astigmatism < 1.50 D were recruited. All subjects had been wearing optical correction – ortho-k lenses
-
Anatomical and physiological considerations in scleral lens wear: Conjunctiva and sclera. Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-07-02 Maria K Walker,Muriel M Schornack,Stephen J Vincent
While scleral lenses have been fitted using diagnostic lenses or impression moulding techniques for over a century, recent advances in anterior segment imaging such as optical coherence tomography and corneo-scleral profilometry have significantly improved the current understanding of the anatomy of the anterior eye including the morphometry of the conjunctiva, sclera, and corneo-scleral junction,
-
The morphology of corneal endothelial cells in long term soft contact lens wearers in Kuala Lumpur. Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-07-02 Bariah Mohd-Ali,Low Yu Chen
Purpose To analyse and compare the alterations in corneal endothelium morphology induced by different materials and durations of wearing soft contact lenses (CL) among young adults living in Kuala Lumpur. Methods Healthy soft CL wearers were invited to participate in this study. Visual acuity (VA) was measured using the Snellen chart, and subjective refraction was performed using cross-cylinder technique
-
Efficacy of a novel water propelled, heating eye mask massager on tear film and ocular adnexa. Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-06-30 Sònia Travé-Huarte,James S Wolffsohn
Purpose To determine the effectiveness of the Aurai water propelled, heating Eye Massager (AEM) in managing dry eye disease and its effects on the ocular adnexa. Methods This prospective, randomised cross-over study enrolled 15 participants (aged 25.8 ± 5.45 years, 5 male). Participants wore a smart watch 24 h a day to track their sleeping cycle and heart rate for 4 weeks, using the AEM twice a day
-
Overnight orthokeratology. Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-04-22 Mark A Bullimore,Leah A Johnson
Overnight orthokeratology lenses are approved in countries all over the world for the temporary reduction in myopia, and recently, one lens design has received regulatory approval for myopia control in Europe. The modern orthokeratology lens has a substantial history from its origins of attempting to flatten the corneal curvature with a spherical rigid contact lens to sophisticated gas permeable lenses
-
Short-term effects of atropine combined with orthokeratology (ACO) on choroidal thickness. Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-06-30 Wenchen Zhao,Zhouyue Li,Yin Hu,Jinyun Jiang,Wen Long,Dongmei Cui,Weiyin Chen,Xiao Yang
Purpose To analyse the one-month change in subfoveal choroidal thickness (SFChT) of myopic children treated with 0.01 % atropine, orthokeratology (OK), or their combination. Methods This is a prospective, randomized controlled trial. One hundred fifty-four children aged between 8 and 12 years with a spherical equivalent (SE) of -1.00 to -6.00 diopters were enrolled. Subjects were randomly assigned
-
The corneoscleral shape in keratoconus patients with and without specialty lens wear. Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-06-08 Stefaan Van Nuffel,Alejandra Consejo,Carina Koppen,Elke O Kreps
Purpose To evaluate differences in corneoscleral shape in keratoconus patients with and without specialty lenses compared to controls. Methods A cross-sectional study was performed comparing three groups of keratoconus eyes: 24 lens-naïve keratoconus eyes (17 patients; group 1), 7 eyes with corneal lens wear (7 patients; group 2) and 7 eyes with scleral lens wear (7 patients; group 3). For comparison
-
Importance of standardizing the number of cells measured for coefficient of variation (COV) estimates of corneal endothelial cell area values as relevant to contact lens wear. Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-06-06 Michael J Doughty
Purpose To assess the impact of using different numbers of cells in calculations of the coefficient of variation (COV) value for normal and polymegethous endothelia Methods Four sets of 20 non-contact specular microscope images obtained from Caucasian individuals were assessed, and categorized according to the extent of polymegethism, i.e. grade 0 (none), grade 1 (mild), grade 2 (moderate) and grade
-
Clinical trial to evaluate the therapeutic benefits of limbal-supported contact lens wear for ocular sequelae due to Stevens-Johnson syndrome/toxic epidermal necrolysis. Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-06-05 Motohiro Itoi,Mayumi Ueta,Ken Ogino,Eriko Sumi,Kojiro Imai,Satoshi Teramukai,Shigeru Kinoshita,Chie Sotozono
Purpose To analyze the therapeutic benefits of limbal-supported contact lens (CL) wear in patients with ocular sequelae due to Stevens-Johnson syndrome (SJS)/toxic epidermal necrolysis (TEN). Methods This interventional study enrolled 10 chronic SJS/TEN eyes with a spectacle best-corrected visual acuity (BCVA) of between 0.01 and 0.7 that were fitted with a limbal-supported CL. At baseline and at after
-
Impact of a low molecular weight hyaluronic acid derivative on contact lens wettability. Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-06-04 Katsuhide Yamasaki,Elizabeth Drolle,Haruki Nakagawa,Ryuji Hisamura,William Ngo,Lyndon Jones
Purpose To investigate the interaction of a novel low molecular weight hyaluronic acid derivative containing hydrophobic groups with soft contact lenses and its effect on lens hydrophilicity compared with a conventional form of hyaluronic acid. Methods This investigation studied the uptake of fluorescently-labelled hyaluronic acid and a low molecular weight hyaluronic acid derivative to four types
-
Intraocular pressure changes in neophyte scleral lens wearers: A prospective study. Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-06-02 Elise G Kramer,Stephen J Vincent
Purpose To examine the variation in intraocular pressure (IOP) during the first six months of scleral lens wear. Methods Thirty-two neophyte scleral lens wearers were recruited and IOP was measured using Goldman applanation tonometry before, and after 1 and 6 months of scleral lens wear (following lens removal). All scleral lenses were designed based on scleral topography or an impression of the ocular
-
Diagnosis and remediation of blink inefficiency. Cont. Lens Anterior Eye (IF 2.578) Pub Date : 2020-06-01 C W McMonnies
To examine the role of incomplete blinking in contributing to blink inefficiency, symptoms of dry eye and ocular surface disease. To review methods for diagnosing blink inefficiency (including both reduced overall blink rate and increased incomplete blink rate) and the role of remediation for efficient complete blinking as an essential part of the lacrimal functional unit in maintaining tear homeostasis
Contents have been reproduced by permission of the publishers.