摘要目的 观察短期停戴角膜塑形镜后屈光度及角膜屈光力回退率.方法 自身对照研究.36例(69眼)患者配戴角膜塑形镜3个月效果稳定,复查时在摘镜后即时、摘镜10 h、摘镜24h观察停戴镜片后的改变.观察指标包括裸眼视力、主观验光、角膜地形图检查.根据已被矫正的屈光度分为3组:＞-4.50 D组,-3.12～-4.50 D组,-0.12～-3.00 D组.采用描述性统计方法.结果 摘镜后不同时间点各参数均逐渐回退.摘镜10 h及摘镜24 h,裸眼视力(logMAR)分别回退0.09±0.20(回退率为11％)和0.30±0.24(回退率为36％).等效球镜度分别回退(0.25±0.74)D(回退率为8％)和(1.15±1.05)D(回退率为36％),角膜平均屈光力(simK)分别回退(0.00±0.85)D(回退率0％)和(0.62±0.68)D(回退率为46％).不同组别回退速度不同,配戴前屈光度越高,停戴后回退的速度越快.结论 摘镜后白天10 h屈光度及角膜屈光力可保持相对稳定,停戴24 h后回退明显,且配戴前屈光度越高,回退的速度越快.

abstractsObjective To describe the regression of refraction and corneal curvature shortly after discontinuing orthokeratology lens wear.Methods This was a self-controlled study.Thirty-six patients (69 eyes) were assessed after wearing orthokeratology lenses for 3 months.Refractive error,uncorrected visual acuity (UCVA) and corneal topography were measured within zero hour after waking and at 10 and 24 hours.Comparison of regression was analyzed for the three levels of myopia achieved (＞-4.50 D,-3.12～-4.50 D,-0.12～-3.00 D).Descriptive statistics were used in this study.Results In general,all the parameters returned toward the baseline after discontinuation of lens wear.At 10 and 24 hours,UCVA (logMAR) returned to 0.09±0.20 (regression rate 11％) and 0.30±0.24 (regression rate 36％),respectively.Spherical equivalent refraction returned to 0.25±0.74 D (regression rate 8％) and 1.15±1.05 D (regression rate 36％),respectively.Corneal curvature (simK) returned to 0.00±0.85 D (recovery rate 0％) and 0.62±0.68 D (recovery rate 46％).The greater the magnitude of refractive error,the more quickly it returned to baseline.Conclusion Refractive error and corneal curvature were relatively stable for 10 hours after discontinuation of orthokeratology lens wear,but all parameters returned and trended to baseline 24 hours after discontinuation.The greater the refractive error,the more quickly it returned to baseline.