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.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
DIAGNOSTIC
Masking
NONE
Enrollment
68
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.
Sehat Medical Complex Hanjarwal
Lahore, Punjab Province, Pakistan
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
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