School of Optometry and Vision Science, UNSW, Sydney, NSW, 2052, Australia.
School of Optometry and Vision Science, UNSW, Sydney, NSW, 2052, Australia; Faculty of Health and Social Care, London South Bank University, London, United Kingdom.
Cont Lens Anterior Eye. 2018 Dec;41(6):501-506. doi: 10.1016/j.clae.2018.08.002. Epub 2018 Sep 14.
To investigate the effects of short-term orthokeratology (OK) on accommodation and binocular visual function in young adults.
Twenty-four myopes (18 to 38 years) were fitted with OK lenses in both eyes. Best corrected distance visual acuity (VA), subjective and objective refractions, corneal topography and a series of binocular vision tests were measured at baseline (BL) before lens wear and then repeated after 28 nights of OK. Data from 15 subjects who demonstrated successful OK lens fit are reported.
Corneal flattening and hyperopic shifts in spherical equivalent refractive error (all p < 0.001) after 28 nights of OK indicated myopic correction. Improvement in best corrected distance VA was measured after OK (right eye p = 0.021; left eye p = 0.014). Although there was no significant change in mean distance and near phorias and stereoacuity scores after OK compared to BL, there was a significant reduction in standard deviation (SD) and range of data (distance p = 0.01; near p = 0.02; stereoacuity p < 0.001). While there appeared to be an improvement in distance accommodative facility after OK, this failed to reach statistical significance (p = 0.053). Furthermore, there was no change in AC/A gradients with ±1 D and ±2 D lenses after OK compared to BL.
Binocular vision remained unchanged after OK, although variability of phoria and stereoacuity measures reduced. This suggests that OK improves or maintains accommodative and binocular vision function in young adult myopes who achieve good vision with OK. Myopes with phorias outside normal ranges and/or poor distance accommodative facility may benefit most with OK, in binocular and accommodative function.
研究短期角膜塑形术（OK）对年轻人调节和双眼视觉功能的影响。
24 名近视患者（18 至 38 岁）双眼均配戴 OK 镜。在配戴镜片前的基线（BL）时测量最佳矫正远视力（VA）、主观和客观屈光、角膜地形图和一系列双眼视觉测试，然后在 28 晚 OK 后重复测量。报告了 15 名成功适配 OK 镜的受试者的数据。
28 晚 OK 后，角膜变平，等效球镜屈光度呈远视漂移（均 p < 0.001），表明近视得到矫正。OK 后最佳矫正远视力得到改善（右眼 p = 0.021；左眼 p = 0.014）。尽管与 BL 相比，OK 后平均远、近隐斜视和立体视锐度评分无显著变化，但标准差（SD）和数据范围显著降低（距离 p = 0.01；近距 p = 0.02；立体视锐度 p < 0.001）。虽然距离调节功能似乎有所改善，但未达到统计学意义（p = 0.053）。此外，与 BL 相比，±1 D 和 ±2 D 镜片的 AC/A 梯度在 OK 后没有变化。
OK 后双眼视觉保持不变，尽管隐斜视和立体视锐度测量的变异性降低。这表明，对于通过 OK 获得良好视力的年轻成年近视患者，OK 可改善或维持调节和双眼视觉功能。隐斜视超出正常范围和/或距离调节功能差的近视患者可能从 OK 治疗中获益最多，无论是在双眼视觉还是调节功能方面。
