Comparative Effect of Cylindrical Lenses Verses Spherical Equilient on Contrast Sensitivity

Superior University

Status

Active, not recruiting

Conditions

Low Vision Aids

Treatments

Diagnostic Test: Contrast sensitivity

Other: Refraction

Study type

Interventional

Funder types

Other

Identifiers

NCT06407336

MSRSW/Batch-Fall22/702

Details and patient eligibility

About

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.

Full 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.

Enrollment

68 patients

Sex

All

Ages

18 to 35 years old

Volunteers

Accepts Healthy Volunteers

Inclusion criteria

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.

Exclusion criteria

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.