Myopia
Conditions
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.
Interventions
COMBINATION_PRODUCTBlue 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.
DIAGNOSTIC_TESTStandard 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.
Sponsors
Superior University
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
HEALTH_SERVICES_RESEARCH
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 50 Years
Healthy volunteers
Yes
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.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Contrast Sensitivity | 12 Months | Measured using the Pelli-Robson chart to assess changes in visual acuity and sensitivity to contrast under different lens conditions. |
| Visual Fatigue | 12 months | The Visual Fatigue Questionnaire (VFQ) was assessed to evaluate subjective experiences of eye strain and fatigue during visual tasks. Computer Vision Syndrome: Evaluated with the Computer Vision Syndrome Questionnaire (CVS-Q) to quantify symptoms associated with prolonged screen use, including dryness, discomfort, and eye strain. |
Countries
Pakistan
Outcome results
None listed