Changes of angle Kappa and corneal morphology changes in myopic patients after Sub
10.11817/j.issn.1672-7347.2021.190472
- Author:
Yi DING
1
;
Zhipei ZHANG
2
;
Xiaoshan MIN
3
;
Xiaobo XIA
4
;
Shengfa HU
4
Author Information
1. Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha 410008. 383074760@qq.com.
2. Department of Ophthalmology, First People's Hospital of Changde City, Changde Hunan 415003, China.
3. Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha 410008. 896653324@qq.com.
4. Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha 410008.
- Publication Type:Journal Article
- Keywords:
Sub-Bowman-Keratomileusis;
angle Kappa;
corneal curvature;
myopia;
post-corneal Diff value
- MeSH:
Cornea/surgery*;
Humans;
Keratomileusis, Laser In Situ;
Myopia/surgery*;
Refraction, Ocular;
Retrospective Studies
- From:
Journal of Central South University(Medical Sciences)
2021;46(2):162-168
- CountryChina
- Language:English
-
Abstract:
OBJECTIVES:To investigate angle Kappa and diopter distribution in myopic patients and the changes of angle Kappa and corneal morphology after Sub-Bowman-Keratomileusis (SBK), and to analyze the effects of the surgery on corneal morphologic changes and the patients' near fixation characteristics.
METHODS:The clinical data of 134 myopic patients (268 eyes) undergoing SBK from August 2015 to August 2016 were retrospectively analyzed. Angle Kappa, corneal curvature in the central corneal region of 3 mm, and post-corneal Diff value were measured by Orbscan IIz Corneal Topography System before operation, 1 month and 6 months after operation. According to the values of angle Kappa before SBK, the patients were divided into 2 groups: the large K group (angle Kappa≥5°, 71 eyes) and the small K group (angle Kappa<5°, 197 eyes). Correlation analysis of the factors influencing angle Kappa at 6 months after operation was performed.
RESULTS:In the large K group, angle Kappa was (5.67±0.65)°, spherical equivalent was (-4.84±2.32) D, and angle Kappa was decreased after operation (both
CONCLUSIONS:The angle Kappa is decreased in low-moderate myopia patients with large angle Kappa, while is increased in high myopia patients with small angle Kappa after SBK. Myopia patients after SBK will look for the new balance of the binocular accommodation and vergence function for improving the comfort in the near-work situations.
