Evaluating the Effect of Optical Zones on Myopia and Astigmatism Correction in SMILE: Vector Analysis
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 140
- 试验地点
- 1
- 主要终点
- astigmatic changes
研究概览
简要总结
Evaluate the effect of the size of optical zones (OZ) on myopia and astigmatism correction in small incision lenticular extraction.
详细描述
To retrospectively study whether different surgical optical zone sizes affect the correction of diopter and astigmatism in myopia patients. Divided into 2 groups according to the diameter of the optical zone. The vector analysis method was used to analyze the changes and errors of astigmatism in TR and SIR after operation. Generalized Estimation Equation (GEE) model is used for multiple regression analysis to evaluate the potential factors related to the error value.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Retrospective
入排标准
- 年龄范围
- 18 Years 至 45 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •no ocular conditions
- •normal topography
- •central corneal thickness, >500µm
- •residual stromal thickness, >280 µm
- •pupil diameter, 2.78-4.9 mm (average, 3.76±0.43 mm);
排除标准
- •history of intraocular surgery
- •pupil diameter, >4.9 mm or <2.78mm
- •keratoconus or corneal ectasia
结局指标
主要结局
astigmatic changes
时间窗: 2021.03
Observe the effect on changes in astigmatism by target induced astigmatism (TIA) versus surgically induced astigmatism (SIA)
error value
时间窗: 2021.04
Target refraction (TR) and surgically induced refraction (SIR) under different optical zones
次要结局
未报告次要终点