Purpose

To compare kinetic visual acuity, stereopsis, ocular deviation, and fusion amplitude before and after implantable collamer lens (ICL) surgery.

Setting

Sanno Hospital.

Design

Retrospective analysis.

Methods

The charts of adult patients who underwent implantation of an ICL with a central aquaport (V4c) for emmetropia were reviewed. The mean preoperative spherical equivalent and subjective astigmatism were −7.87 diopters (D) ± 3.13 (SD) and −0.75 ± 0.78 D, respectively. All measurements were obtained with full refraction before surgery and without spectacle correction after surgery. The kinetic visual acuity was measured with the AS-4D device. Stereopsis and ocular deviation were measured with the Titmus Stereotest and an alternate prism cover test, respectively. Fusion amplitude was determined from breakpoints measured using a prism.

Results

The study comprised 29 adult patients (58 eyes). One month postoperatively, the mean safety and efficacy indices were 1.13 ± 0.20 and 0.96 ± 0.25, respectively, and 57 eyes (98.7%) were within ±0.5 D of the target correction. The mean kinetic visual acuity (logarithm of the minimum angle of resolution) was 0.30 ± 0.21 preoperatively and 0.20 ± 0.15 (Snellen 20/40 versus 20/32) postoperatively and the mean stereopsis (seconds of arc), 48.5 ± 1.6 versus 41.5 ± 1.1; both improved significantly (P < .001 and P = .012, respectively). The mean distance ocular deviation (−4.0 ± 3.8 prism diopters [Δ] versus 2.8 ± 3.6 Δ; P = .002) and near ocular deviation (−6.5 ± 6.7 Δ versus 5.4 ± 6.9 Δ; P = .04) decreased significantly. The fusion amplitude increased for near vision only.

Conclusions

ICL implantation improved kinetic visual acuity and stereopsis, decreased ocular deviation, and increased near fusion amplitude.

中文翻译：

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运动型视敏度，立体视和眼内偏斜

目的

比较植入式聚光镜（ICL）手术前后的动态视敏度，立体视，眼偏度和融合幅度。

设置

山野医院。

设计

回顾性分析。

方法

回顾了成年患者的图表，这些患者接受了ICL植入和中央屈指中心（V4c）治疗正视。术前平均球镜等效和主观散光分别为-7.87屈光度（D）±3.13（SD）和-0.75±0.78D。所有测量均在手术前完全折射且手术后未矫正眼镜的情况下获得。用AS-4D设备测量动力学视力。分别使用Titmus Stereotest和替代性棱镜遮盖试验测量立体视和眼球偏斜。由使用棱镜测量的断点确定融合幅度。

结果

该研究包括29位成年患者（58眼）。术后1个月，平均安全性和有效性指数分别为1.13±0.20和0.96±0.25，57眼（98.7％）在目标矫正度的±0.5 D之内。术前平均运动视力（最小分辨角的对数）为0.30±0.21，术后为0.20±0.15（Snellen 20/40对20/32），平均立体视（弧度秒）为48.5±1.6对41.5± 1.1; 两者均显着改善（分别为P <.001和P = .012）。平均距离眼偏差（-4.0±3.8棱镜屈光度[Δ]对2.8±3.6Δ; P = .002）和近眼偏差（-6.5±6.7Δ对5.4±6.9Δ; P= .04）显着降低。融合幅度仅针对近视增加。

结论

ICL植入改善了运动视敏度和立体视，减少了眼偏差，并增加了近融合幅度。