Summary
This prospective clinical trial found that blue-light filtering ophthalmic lenses (Crizal® Prevencia) significantly reduced digital eye strain symptoms in computer users after 4 weeks compared to standard lenses. These findings suggest that for individuals spending more than 4 hours daily on computers, blue-light filtering lenses may be a practical intervention to reduce visual discomfort.
Key Findings
- Total digital asthenopia score was significantly reduced from 17.61±5.51 (baseline, no blue-light filter) to 13.78±7.51 after 4 weeks of blue-light filtering lens use (p<0.001), representing approximately a 22% reduction.
- Study included 49 volunteers (mean age 29.07±5.50 years, 18 male/31 female) who used computers more than 4 hours per day.
- Statistical analysis used the non-parametric Wilcoxon test, with significance threshold set at p<0.05.
Categories
Eye Health & Vision: The study directly measures digital eye strain (asthenopia) symptoms and evaluates blue-light filtering lenses as an intervention.
The Science of Light: The study involves spectral filtering of blue light from computer screens and its effect on visual discomfort, relevant to understanding blue light's role in eye strain.
Author(s)
ACFL Alionis, AL Netto, TAFL Netto, MR Alves
Publication Year
2020
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