Comparison of Pre-operative Measurements With Intraoperative Aberrometry in Predicting Needed Correction for Low Toric Lens Correction in Cataract Surgery
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 200
- 试验地点
- 2
- 主要终点
- Proportion of Patients requiring Astigmatism Correction
研究概览
简要总结
Examination of the accuracy of toric predictive power in patients with 1.5 diopters of astigmatism or less.
详细描述
Based on preoperative keratometry and using the Baylor Nomogram and a standard factor for surgically-induced astigmatism, the investigators will calculate "keratometry-based total astigmatism" for each patient. This will be compared to "aberrometry-based total astigmatism", i.e. the total astigmatism measured by ORA in each case. With this information the investigators will determine in what portion of patients keratometry-based total astigmatism vs aberrometry-based total astigmatism predicts a need for astigmatism correction, (i.e., total astigmatism is greater than or equal to 0.5 D) during cataract surgery.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Diagnostic
- 盲法
- None
入排标准
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Patients who underwent conventional (non-femtosecond) cataract surgery and whose "data to be collected" are accessible and available from the ORA database.
- •Patients whose medical records show they did not exhibit any significant ocular morbidity that would be expected to influence outcome measures.
排除标准
- •Patients with visually significant co-morbidities (corneal, retina, optic nerve disease) that could affect their visual outcome or ability to be refracted after.
- •Patients with surgical complications either during or after surgery (capsule tears, iris trauma, decentered IOL, cystoid macular edema, etc.)
- •Patients with previous refractive surgery.
结局指标
主要结局
Proportion of Patients requiring Astigmatism Correction
时间窗: up to 3 months
Proportion of patients requiring astigmatism correction, i.e., having need for astigmatism correction of greater than or equal to 0.5 D during cataract surgery, when measured by preoperative keratometry vs intraoperative aberrometry.
次要结局
- Patients with Postoperative residual astigmatism 0.5 to 1.0 diopter(up to 3 months)
- Patients with Postoperative residual astigmatism 1.0 to 1.5 diopter(up to 3 months)