An interventional study of Contrast sensitivity and Refraction in Low Vision Aids, sponsored by Superior University. Active, not recruiting at 1 site in Pakistan. Open to participants aged 18 Years to 35 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2024-05-09.
Sponsored by Superior University · Not applicable, Interventional, and Diagnostic
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.
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.
214 studies on the registry are indexed under Vision, Low; 41 are open to participants now.
This study's enrollment of 68 is above the median of 60 across 155 interventional studies indexed under Vision, Low.
Browse Vision, Low studies →Superior University is the lead sponsor of 242 studies on the registry; 24 are open to participants now.
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Exclusion Criteria:
Diagnostic Test: Contrast sensitivity
Other: Refraction
Contrast sensitivity will be assessed by using two different techniques of refraction on is Cylinderical lens and other is Spherical equivalent
Refraction will be performed and contrast sensitivity will be assessed to assess patient comfort level and compliance.
Contrast sensitivity
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
Time frame: 12 Months
Plan to share: No
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This study is active, not recruiting, as verified in May 2024. You cannot join it, but the record below documents what was studied.
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