Pentacam Findings After Implantation of Intrastromal Corneal Rings in Keratoconus.
试验速览
- 阶段
- 不适用
- 入组人数
- 44
- 试验地点
- 1
- 主要终点
- The percentage of changes of anterior corneal surface preoperatively compared to those values postoperativaly
研究概览
简要总结
keratoconus is a progressive corneal ectatic disease characterized by paraxial stromal thinning and weakening, resulting in irregular astigmatism, corneal protrusion, and distortion of the anterior corneal surface. It is usually bilateral, although asymmetrical in most cases.
Intrastromal corneal rings are polymethylmethacrylate devices successfully used for the management of keratoconus, pellucid marginal degeneration, post-LASIK ectasia and myopia. Intrastromal corneal rings implantation is safe and reversible procedure that does not affect the central corneal area, and hence, avoids interference with visual axis. The goal of intrastromal corneal rings implantation is to improve visual acuity by regulariztion of the anterior corneal surface.
研究设计
- 研究类型
- Observational
- 观察模型
- Other
- 时间视角
- Cross Sectional
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
- •Keratoconus grade I, II and III according to the mean K Amsler-Krumeich classification.
- •Contact lens intolerance.
- •Thinnest location is more than 400 um.
- •Maximum keratometry (Kmax) between 48 and 64 D.
- •Clear cornea with no Vogt's striae.
排除标准
- •Previous corneal surgery.
- •Grade IV with corneal scarring.
- •Concurrent corneal disease in addition to KC.
- •Autoimmune or systemic connective tissue diseases.
结局指标
主要结局
The percentage of changes of anterior corneal surface preoperatively compared to those values postoperativaly
时间窗: 1 month
The changes of anterior corneal surface including flat (K1) and steep (K2) keratometry values, corneal astigmatism (Astig) preoperatively compared to those values postoperativaly
次要结局
未报告次要终点
研究者
Ahmed Mohamed Abbas
Principal investigator
Assiut University