Comparative Effect of Cylindrical Lenses Verses Spherical Equilient on Contrast Sensitivity

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

ACTIVE_NOT_RECRUITING

Clinical Phase

NA

Total Enrollment

68 participants

Study Classification

INTERVENTIONAL

Study Start Date

2023-10-01

Study Completion Date

2024-09-01

Brief Summary

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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.

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Detailed Description

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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

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Low Vision Aids

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

DIAGNOSTIC

Blinding Strategy

NONE

Study Groups

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Contrast sensitivity

Group Type EXPERIMENTAL

Contrast sensitivity

Intervention Type DIAGNOSTIC_TEST

Contrast sensitivity will be assessed by using two different techniques of refraction on is Cylinderical lens and other is Spherical equivalent

Refraction

Group Type OTHER

Refraction

Intervention Type OTHER

Refraction will be performed and contrast sensitivity will be assessed to assess patient comfort level and compliance.

Interventions

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Contrast sensitivity

Contrast sensitivity will be assessed by using two different techniques of refraction on is Cylinderical lens and other is Spherical equivalent

Intervention Type DIAGNOSTIC_TEST

Refraction

Refraction will be performed and contrast sensitivity will be assessed to assess patient comfort level and compliance.

Intervention Type OTHER

Eligibility Criteria

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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.

Minimum Eligible Age

18 Years

Maximum Eligible Age

35 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes