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Laboratory evaluation of higher-order aberrations and light scattering in explanted opacified intraocular lenses
Eye and Vision ( IF 4.1 ) Pub Date : 2021-04-22 , DOI: 10.1186/s40662-021-00235-5
Grzegorz Łabuz , Timur M. Yildirim , Gerd U. Auffarth , Hyeck-Soo Son , Ramin Khoramnia

Intraocular lens (IOL) calcification is a serious condition that can only be treated by removing the clouded lens. Since explantation bears the risk of complications, it is often deferred until the patient finds the symptoms intolerable. Usually, as the IOL opacifies, visual acuity is minimally affected early on. In this study, we assessed the impact of IOL opacification on optical quality. We analyzed ten opacified explanted IOLs (Oculentis GmbH). Wavefront aberrations were obtained with a SHSOphthalmic device (Optocraft GmbH), which features a Hartmann-Shack sensor. The root mean square (RMS) of higher-order aberrations (HOAs) was compared. The effect of calcification on image quality was assessed through the Strehl ratio (SR). We detected light scattering with a C-Quant (Oculus GmbH) and expressed it as a straylight parameter. At 2 mm, 3 mm and 4 mm, the mean RMS (±standard deviation) was 0.033 μm (±0.026 μm), 0.044 μm (±0.027), and 0.087 μm (±0.049), respectively. The mean SR value was 0.81 ± 0.15 at 3 mm, with four IOLs showing a nearly diffraction-limited performance, but in two explants, opacification precluded reliable measurements. Increased straylight was found in all opacified IOLs with a mean value of 150.2 ± 56.3 deg2/sr at 3 mm. We demonstrated that IOL opacification induces HOAs. However, the RMS remained low, which resulted only in a slight reduction of the SR-derived optical quality. On the other hand, we found a severe straylight elevation in the opacified lenses, which may result in dysphotopsia, such as glare, and subjective complaints, despite good visual acuity.

中文翻译:

植入的不透明人工晶状体的高阶像差和光散射的实验室评估

人工晶状体(IOL)钙化是一种严重的疾病,只能通过去除浑浊的晶状体来治疗。由于外植具有并发症的风险,因此通常推迟到患者发现症状无法忍受之前。通常,随着IOL的消失,视力在早期就受到的影响最小。在这项研究中,我们评估了人工晶状体混浊对光学质量的影响。我们分析了十个混浊的外植人工晶体(Oculentis GmbH)。使用具有Hartmann-Shack传感器的SHSOphthalmic设备(Optocraft GmbH)获得了波前像差。比较了高阶像差(HOA)的均方根(RMS)。钙化对图像质量的影响通过斯特列尔比(SR)进行评估。我们使用C-Quant(Oculus GmbH)检测到光散射,并将其表示为杂散光参数。在2毫米处 3毫米和4毫米时,平均RMS(±标准偏差)分别为0.033μm(±0.026μm),0.044μm(±0.027)和0.087μm(±0.049)。在3 mm处,平均SR值为0.81±0.15,四个IOL表现出近乎衍射极限的性能,但是在两个外植体中,混浊阻碍了可靠的测量。在所有不透明的IOL中,杂散光均增加,在3 mm处的平均值为150.2±56.3 deg2 / sr。我们证明了人工晶状体混浊诱导HOA。但是,RMS仍然很低,这仅导致SR衍生的光学质量略有下降。另一方面,尽管视力良好,但我们发现混浊的晶状体中的杂散光严重升高,这可能会导致视力不佳(例如眩光)和主观不适。分别为087μm(±0.049)。在3 mm处,平均SR值为0.81±0.15,四个IOL表现出近乎衍射极限的性能,但是在两个外植体中,混浊阻碍了可靠的测量。在所有不透明的IOL中,杂散光均增加,在3 mm处的平均值为150.2±56.3 deg2 / sr。我们证明了人工晶状体混浊诱导HOA。但是,RMS仍然很低,这仅导致SR衍生的光学质量略有下降。另一方面,尽管视力良好,但我们发现混浊的晶状体中的杂散光严重升高,这可能会导致视力不佳(例如眩光)和主观不适。分别为087μm(±0.049)。在3 mm处,平均SR值为0.81±0.15,四个IOL表现出近乎衍射极限的性能,但是在两个外植体中,混浊阻碍了可靠的测量。在所有不透明的IOL中,杂散光均增加,在3 mm处的平均值为150.2±56.3 deg2 / sr。我们证明了人工晶状体混浊诱导HOA。但是,RMS仍然很低,这仅导致SR衍生的光学质量略有下降。另一方面,尽管视力良好,但我们发现混浊的晶状体中的杂散光严重升高,这可能会导致视力不佳(例如眩光)和主观不适。在所有不透明的IOL中,杂散光均增加,在3 mm处的平均值为150.2±56.3 deg2 / sr。我们证明了人工晶状体混浊诱导HOA。但是,RMS仍然很低,这仅导致SR衍生的光学质量略有下降。另一方面,尽管视力良好,但我们发现混浊晶状体中的杂散光严重升高,这可能会导致视力不佳(例如眩光)和主观不适。在所有不透明的IOL中,杂散光均增加,在3 mm处的平均值为150.2±56.3 deg2 / sr。我们证明了人工晶状体混浊诱导HOA。但是,RMS仍然很低,这仅导致SR衍生的光学质量略有下降。另一方面,尽管视力良好,但我们发现混浊的晶状体中的杂散光严重升高,这可能会导致视力不佳(例如眩光)和主观不适。
更新日期:2021-04-22
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