Comparative Effect of Cylindrical Lenses Verses Spherical Equilient on Contrast Sensitivity

NCT06407336 | Active Not Recruiting DMC

• 1 other identifier: MSRSW/Batch-Fall22/702
• Study Type: interventional
• Target: 68
• Locations: 1 country
• Sites: 1

Brief 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.

Conditions

Low Vision Aids

Outcome Measures

Primary Outcomes (1)

• 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

  12 Months

Study Arms (2)

Contrast sensitivity

EXPERIMENTAL

Diagnostic Test: Contrast sensitivity

Refraction

OTHER

Other: Refraction

Interventions

Contrast sensitivity DIAGNOSTIC_TEST

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

Contrast sensitivity

Refraction OTHER

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

Refraction

Eligibility Criteria

• Age: 18 Years - 35 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• 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.

You may not qualify if:

• 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.

Sponsors & Collaborators

• Superior University: lead

Study Sites (1)

Sehat Medical Complex Hanjarwal

Lahore, Punjab Province, Pakistan

Location

MeSH Terms

Interventions

Contrast Sensitivity; Refraction, Ocular

Intervention Hierarchy (Ancestors)

Visual Acuity; Vision Tests; Diagnostic Techniques, Ophthalmological; Diagnostic Techniques and Procedures; Diagnosis; Ocular Physiological Phenomena; Optical Phenomena; Physical Phenomena

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: NONE
• Purpose: DIAGNOSTIC
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Principal Investigator

Study Record Dates

• First Submitted: May 2, 2024
• First Posted: May 9, 2024
• Study Start: October 1, 2023
• Primary Completion: March 1, 2024
• Study Completion: September 1, 2024
• Last Updated: May 9, 2024

Record last verified: 2024-05

Data Sharing

• IPD Sharing: Will not share

Locations

PA (1)