NCT06407336

Comparative Effect of Cylindrical Lenses Verses Spherical Equilient on Contrast Sensitivity

• Status: Active Not Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 68 (actual)
• Sponsor: Superior University · Academic / Other
• Sex: All
• Age: 18 Years – 35 Years
• Healthy volunteers: Accepted

Summary

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.

Detailed description

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.

Conditions

• Low Vision Aids

Interventions

Type	Name	Description
DIAGNOSTIC_TEST	Contrast sensitivity	Contrast sensitivity will be assessed by using two different techniques of refraction on is Cylinderical lens and other is Spherical equivalent
OTHER	Refraction	Refraction will be performed and contrast sensitivity will be assessed to assess patient comfort level and compliance.

Timeline

• Start date: 2023-10-01
• Primary completion: 2024-03-01
• Completion: 2024-09-01
• First posted: 2024-05-09
• Last updated: 2024-05-09

Locations

1 site across 1 country: Pakistan