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Current applications and efficacy of scleral contact lenses - a retrospective study

机译：巩膜隐形眼镜的当前应用和功效-回顾性研究

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Purpose: To evaluate the indications and efficacy of high gas permeable scleral contact lenses (GP-SCL). Methods: A total database of 97 consecutive patients (140 eyes) fitted with GP-SCL between January 2003 and December 2008, was retrospectively analyzed to determine the benefits of fitting scleral lenses. All lenses were fitted by preformed technique and were non-fenestrated. Patients included keratoconus - 88 eyes (63 %); corneal irregularities after penetrating keratoplasty - 39 eyes (28 %); various ocular surface disorders: Stevens-Johnson syndrome (SJS), graft versus host disease (GVHD) and exposure keratopathy - 6 eyes (4 %); post refractive surgery keratoectasia - 4 eyes (3 %), and high refractive error - 3 eyes (2 %). Results: Mean follow up was 27.5 months (range 1-71), mean wearing time in successful wearers group was 12.2 hours per day (range 10-16), mean wearing time in group of wearers who dropped out using GP-SCL, was 5.8 hours (range 3-8). Keratoconus patients achieved median best corrected visual acuity (BCVA) of 20/32, 84 % of patients achieved BCVA of 20/40 or more. The post keratoplasty group achieved median BCVA of 20/25, 92 % of patients achieved BCVA of 20/40 or better. In the other groups, median BCVA was as follows: ocular surface disorders - 20/50, keratoectasia - 20/30, high refractive error - 20/32. Positive fluid-venting was highly associated with successful GP-SCL wearing. Twenty patients (21 %) failed to wear GP-SCL. Conclusions: GP-SCL's expand the management of various corneal abnormalities. The main indication for GP-SCL is optical correction of an irregular corneal surface, especially keratoconus and corneal transplant.
机译：目的：评估高透气性巩膜接触镜（GP-SCL）的适应症和疗效。方法：回顾性分析2003年1月至2008年12月期间共97例（140眼）连续性GP-SCL患者的资料，以确定采用巩膜镜片的好处。所有镜片均通过预制技术进行装配，并且没有开窗。患者包括圆锥角膜-88只眼（63％）;穿透性角膜移植术后角膜不规则-39眼（28％）;多种眼表疾病：史蒂文斯-约翰逊综合征（SJS），移植物抗宿主病（GVHD）和暴露性角膜病变-6眼（4％）;屈光手术后角膜扩张-4眼（3％），高屈光不正-3眼（2％）。结果：平均随访时间为27.5个月（范围为1-71），成功佩戴者组的平均佩戴时间为每天12.2小时（范围为10-16），使用GP-SCL退学的佩戴者组的平均佩戴时间为5.8小时（范围3-8）。圆锥角膜患者的中位最佳矫正视力（BCVA）为20 / 32，84％的患者BCVA为20/40或更高。角膜移植术后组的BCVA中位数为20 / 25，92％的患者BCVA为20/40或更高。在其他组中，中位BCVA如下：眼表疾病-20/50，角膜扩张-20/30，高屈光不正-20/32。积极的排空与GP-SCL的成功佩戴高度相关。 20名患者（21％）未能佩戴GP-SCL。结论：GP-SCL扩大了对各种角膜异常的处理。 GP-SCL的主要适应症是对不规则角膜表面进行光学矫正，尤其是圆锥角膜和角膜移植。

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