Effects of Blue of Glasses VS Standard Lenses on Contrast Sensitivity & Visual Fatigue in Myopic & Non-Myopic Adults

NCT ID: NCT06739525

Last Updated: 2024-12-18

Basic Information

• Recruitment Status: ACTIVE_NOT_RECRUITING
• Clinical Phase: NA
• Total Enrollment: 64 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2024-02-28
• Study Completion Date: 2025-01-31

Brief Summary

This study investigates the effects of blue light-blocking glasses compared to standard lenses on contrast sensitivity and visual fatigue in myopic and non-myopic adults. With the growing use of digital screens, blue light exposure has raised concerns due to potential eye strain, sleep disruption, and visual fatigue.

Detailed Description

While blue light-blocking lenses are marketed to address these issues, evidence of their efficacy, particularly for different refractive errors like myopia, remains inconclusive. Using a randomized controlled design, this study will assess both groups across specific visual tasks to measure contrast sensitivity and visual fatigue. Outcomes are evaluated using validated tools, including the Computer Vision Syndrome Questionnaire (CVS-Q) and Visual Fatigue Questionnaire (VFQ), with measurements taken at baseline, 2 weeks, and 4 weeks. Findings are expected to clarify the potential advantages of blue light-blocking glasses over standard lenses, aiding in evidence-based recommendations for adults with varying visual needs.

Conditions

Myopia

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: HEALTH_SERVICES_RESEARCH
• Blinding Strategy: NONE

Study Groups

interventional group

Group Type: EXPERIMENTAL

Blue Light-Blocking Glasses (Intervention Group)

Intervention Type: COMBINATION_PRODUCT

Participants in this arm wore blue light-blocking glasses designed to filter out a portion of short-wavelength blue light. These lenses were intended to reduce eye strain and protect against blue light exposure, especially during prolonged screen time. Participants used blue light-blocking glasses consistently throughout the study period to assess their effect on contrast sensitivity and visual fatigue.

Control Group

Group Type: ACTIVE_COMPARATOR

Standard Lenses (Control Group)

Intervention Type: DIAGNOSTIC_TEST

Participants in this arm wore standard lenses without any blue light-blocking properties. These lenses allow the full spectrum of visible light to pass through and serve as a baseline control to measure against the blue light-blocking glasses. Participants used these lenses under the same conditions to assess contrast sensitivity and visual fatigue without blue light filtration.

Interventions

Blue Light-Blocking Glasses (Intervention Group)

Participants in this arm wore blue light-blocking glasses designed to filter out a portion of short-wavelength blue light. These lenses were intended to reduce eye strain and protect against blue light exposure, especially during prolonged screen time. Participants used blue light-blocking glasses consistently throughout the study period to assess their effect on contrast sensitivity and visual fatigue.

Intervention Type: COMBINATION_PRODUCT

Standard Lenses (Control Group)

Participants in this arm wore standard lenses without any blue light-blocking properties. These lenses allow the full spectrum of visible light to pass through and serve as a baseline control to measure against the blue light-blocking glasses. Participants used these lenses under the same conditions to assess contrast sensitivity and visual fatigue without blue light filtration.

Intervention Type: DIAGNOSTIC_TEST

Eligibility Criteria

Inclusion Criteria

• Adults aged 18-50 years.
• Both myopic (with any degree of myopia) and non-myopic adults.
• Participants who use computer screens for at least four hours per day.
• Individuals currently using corrective lenses or willing to wear study-provided glasses during the experiment.
• Individuals willing to complete the study protocol, which includes attending follow-up examinations and filling out visual fatigue questionnaires.

Exclusion Criteria

• A history of any serious vision-related condition (such as glaucoma, cataracts, or retinal problems).
• Individuals who have already undergone refractive surgery (e.g., LASIK) or other types of eye surgery.
• Systemic conditions affecting vision include diabetes, neurological problems, and any other ailment that may impair visual ability.
• Taking drugs that are known to impair vision or produce visual tiredness (for example, certain antihistamines and antidepressants).
• Pregnant women's visual performance may be affected by hormonal changes.
• People with uncorrected vision difficulties cannot use the prescription lenses during study time.
• Participants who are allergic or sensitive to lens materials.

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 50 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Superior University

OTHER

Sponsor Role: lead

Responsible Party

Muhammad Naveed Babur

Principal Investigator

Responsibility Role: PRINCIPAL_INVESTIGATOR

Locations

Tehsil Headquarters (THQ)

Taunsa, Punjab Province, Pakistan

Countries

Pakistan

Other Identifiers

MSRSW/Batch-Fall22/749

Identifier Type: -

Identifier Source: org_study_id