Cheung Sin-Wan, Cho Pauline
Centre for Myopia Research, Area of Strategic Development, Department of Optometry and Radiography, The Hong Kong Polytechnic University, Kowloon, HKSAR, China.
Curr Eye Res. 2004 Feb;28(2):121-7. doi: 10.1076/ceyr.28.2.121.26236.
To determine which clinical tests are useful in orthokeratology aftercare examination, and to examine the objective and subjective characteristics of a group of orthokeratology lens wearers.
Thirty orthokeratology subjects (8-19 years) who had been wearing orthokeratology lenses for over 12 months were recruited. Autorefraction, corneal topography, retinoscopy, subjective refraction and biomicroscopy were performed. Only left eyes results were analysed. Subjective ratings of symptoms and problems experienced by subjects were obtained using a questionnaire.
Autorefraction yielded higher residual sphere and residual cylinder by -0.54 D and -0.39 D respectively while retinoscopy yielded higher residual sphere and residual cylinder by -0.20 D and -0.03 D respectively. Corneal toricity measured by autokeratometry and corneal topography overpredicted the residual cylinder by -2.02 D and -2.08 D respectively. The mean +/- SD residual spherical equivalent refractive error was -0.11 +/- 0.57 D and the mean +/- SD unaided postorthokeratology visual acuity was 0.08 +/- 0.14 logMAR. The unaided visual acuity was significantly related to the residual cylinder. Pigmented arc was present in 16 corneas (53%). The most common problems/symptoms experienced by the subjects were lens binding (73%), ocular discharge in the morning (69%) and blur distance vision (47%). Over 80% of the subjects found lens handling troublesome in varying degree. All, except two subjects (who disliked the lens handling), wanted to continue the treatment.
History taking, subjective refraction, biomicroscopy and corneal topography are important in a routine orthokeratology aftercare examination. Corneal pigmented arc, ocular discharge in the morning and lens binding were the most common sign, symptom and problem respectively observed/ reported. Most orthokeratology lens wearers with low to moderate myopia and low astigmatism enjoyed reasonably good unaided post-orthokeratology vision in the daytime.
确定哪些临床检查对角膜塑形术的术后复查有用，并研究一组角膜塑形镜佩戴者的客观和主观特征。
招募了30名佩戴角膜塑形镜超过12个月的角膜塑形术受试者（年龄8 - 19岁）。进行了自动验光、角膜地形图检查、检影验光、主观验光和生物显微镜检查。仅分析左眼结果。使用问卷获取受试者对所经历症状和问题的主观评分。
自动验光得出的残余球镜和残余柱镜分别高出 -0.54 D和 -0.39 D，而检影验光得出的残余球镜和残余柱镜分别高出 -0.20 D和 -0.03 D。自动角膜曲率计和角膜地形图测量的角膜散光分别高估残余柱镜 -2.02 D和 -2.08 D。平均±标准差的残余球镜等效屈光不正为 -0.11±0.57 D，角膜塑形术后未矫正视力的平均±标准差为0.08±0.14 logMAR。未矫正视力与残余柱镜显著相关。16只角膜（53%）出现色素弧。受试者最常见的问题/症状是镜片粘连（73%）、晨起眼部分泌物（69%）和远视力模糊（47%）。超过80%的受试者发现镜片操作在不同程度上存在麻烦。除两名受试者（不喜欢镜片操作）外，所有受试者都希望继续治疗。
病史采集、主观验光、生物显微镜检查和角膜地形图检查在角膜塑形术的常规术后复查中很重要。角膜色素弧、晨起眼部分泌物和镜片粘连分别是最常见的体征、症状和问题。大多数中低度近视和低度散光的角膜塑形镜佩戴者在白天享有较好的角膜塑形术后未矫正视力。
