夜间角膜塑形术后对比敏感度与角膜形态的关系

Relationship between contrast sensitivity and corneal shape following overnight orthokeratology.

作者信息

Liu Li-Li, Gong Li-Ping, Xu Yue-Yuan, Zhu Xuan, Chen Kaddie Kwok, Liu Wei-Feng

机构信息

The Eye Hospital of Nanchang University, Nanchang 330000, Jiangxi Province, China.

The Second Affiliated Hospital of Nanchang University, Nanchang 330000, Jiangxi Province, China.

出版信息

Int J Ophthalmol. 2019 Feb 18;12(2):275-279. doi: 10.18240/ijo.2019.02.14. eCollection 2019.

DOI:10.18240/ijo.2019.02.14

PMID:30809484

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6376229/

Abstract

AIM

To evaluate the relationship between contrast sensitivity (CS) and corneal shape following overnight orthokeratology (OK).

METHODS

We conducted a retrospective clinical study of 80 lens-wearing myopia patients, all of whom had undergone OK and had been evaluated by Orbscan II topography. We measured the surface irregularity index (SIRI) of corneal topography at 3 and 5 mm, the size of the flattened central corneal curvature of OK lens (zone A), the size of the cornea altered by OK lens (zone B), the size of the pupillary area at the corneal level (zone C), the area of crossover between zones A and C (zone AC), the area of crossover between zones B and C (BC), the ratio of BC to B (BC/B), and the ratio of AC to C (AC/C). CS was evaluated using the CSV-1000 with spatial frequencies of 3, 6, 12, and 18 cycles/degree (CPD).

RESULTS

Multiple correlation analyses indicated significant negative correlations between CS, zone C, BC/B, and 3-mm SIRI (all <0.01). There were no significant differences between CS, zone B, AC/A, or 5-mm SIRI (=0.60, 0.94 and 0.11, respectively). Zone C was negatively correlated with 3, 6, 12, and 18 CPD. 5-mm SIRI were negatively correlated with 6, 12, and 18 CPD. BC/C was negatively correlated with 6 and 18 CPD. AC/C was positively correlated with 3 CPD.

CONCLUSION

Zone C, 3-mm SIRI and BC/B affect the CS following overnight OK.

摘要

目的

评估夜间角膜塑形术（OK）后对比敏感度（CS）与角膜形态之间的关系。

方法

我们对80例佩戴镜片的近视患者进行了一项回顾性临床研究，所有患者均接受了OK治疗并通过Orbscan II地形图进行了评估。我们测量了角膜地形图在3毫米和5毫米处的表面不规则指数（SIRI）、OK镜片扁平中央角膜曲率的大小（A区）、OK镜片改变的角膜大小（B区）、角膜水平处瞳孔区的大小（C区）、A区和C区之间的交叉面积（AC区）、B区和C区之间的交叉面积（BC区）、BC与B的比值（BC/B）以及AC与C的比值（AC/C）。使用CSV-1000以3、6、12和18周期/度（CPD）的空间频率评估CS。

结果

多重相关分析表明，CS、C区、BC/B和3毫米SIRI之间存在显著负相关（均<0.01）。CS、B区、AC/A或5毫米SIRI之间无显著差异（分别为=0.60、0.94和0.11）。C区与3、6、12和18 CPD呈负相关。5毫米SIRI与6、12和18 CPD呈负相关。BC/C与6和18 CPD呈负相关。AC/C与3 CPD呈正相关。