Comparative Effect of Cylindrical Lenses Verses Spherical Equilient on Contrast Sensitivity
试验速览
- 阶段
- 不适用
- 状态
- 进行中（未招募）
- 入组人数
- 68
- 试验地点
- 1
- 主要终点
- Contrast sensitivity
研究概览
简要总结
the concept of spherical equivalent plays a pivotal role in simplifying the prescription and enhancing communication between eye care professionals and patients. The spherical equivalent is a calculated value that condenses the spherical and cylindrical components into a single power.
详细描述
Mathematically, it is determined by adding half of the cylindrical power to the spherical power (SE = Sphere + (Cylinder/2)). This calculated value serves as a convenient representation of the overall refractive error, aiding in a more straightforward understanding of the prescription. Understanding their individual and collective impact on contrast sensitivity opens up new avenues for refining corrective interventions and enhancing the overall quality of vision. This article aims to demystify the intricate relationship between spherical equivalent and cylindrical correction, and their collective impact on contrast sensitivity.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Diagnostic
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 35 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Patients within 18 to 35 years will be included.
- •Both genders will be included.
- •Patients having astigmatism will be included.
- •Patients having 6/6 corrected vision will be included.
- •Eyes having no other ocular pathology will be included.
- •Patients having no history of ocular surgery or corneal scar will be included.
排除标准
- •i. Eyes having any ocular pathology will be excluded.
- •Patients with corneal suture will be excluded.
- •Those using contact lenses instead of spectacles for vision correction will be excluded.
- •Participants with a history of eye surgery within the past year will be excluded.
研究组 & 干预措施
Contrast sensitivity
干预措施: Contrast sensitivity (Diagnostic Test)
Refraction
干预措施: Refraction (Other)
结局指标
主要结局
Contrast sensitivity
时间窗: 12 Months
The ability to perceive sharp and clear outlines of very small objects. It is also defined as the ability to identify minute differences in the shadings and patterns. CS helps detect objects without a clear outline and distinguish them from their background contrast
次要结局
未报告次要终点
研究者
Muhammad Naveed Babur
Principal Investigator
Superior University