NCT00563667Unknown不适用
Effect of Pterygium Excision on IOL Power Calculation: Concurrent Cataract and Pterygium
Hospital Authority, Hong Kong3 个研究点 分布在 1 个国家目标入组 40 人开始时间: 2003年12月1日最近更新:
适应症
试验速览
- 阶段
- 不适用
- 发起方
- 入组人数
- 40
- 试验地点
- 3
- 主要终点
- IOL power
研究概览
简要总结
Pterygium is known to induce with-the-rule astigmatism. Excision of pterygium will steepen the cornea and reduce corneal astigmatism. We postulate that the alteration of keratometry reading will indirectly affect the IOL power calculation in cases with concurrent pterygium and cataract. Concurrent pterygium and cataract is common in Hong Kong and other tropical regions. The effect of pterygium excision on intraocular lens power calculation is investigated.
研究设计
- 研究类型
- Interventional
- 分配方式
- Non Randomized
- 干预模型
- Single Group
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •All cases with concomitant cataract and primary pterygium, which are indicated for surgery.
排除标准
- •Pterygium smaller than 1mm, which is not visually significant.
- •Double headed pterygium
- •Pterygium obscuring visual axis that preclude keratometry or autorefraction measurements.
- •Previous corneal refractive surgery that alter the keratometric power of the cornea.
- •Patients with medical problems that preclude staged ocular surgery, e.g. dementia, heart disease, on warfarin.
结局指标
主要结局
IOL power
时间窗: 1 and 3 months post pterygium excision
Astigmatism
时间窗: 1 and 3 months post pterygium excision
次要结局
未报告次要终点
研究者
研究点 (3)
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