Do blue light glasses effectively prevent eye strain?
Written by
Robert Kelly
Reviewed by
Prof. William Dalton, Ph.D.Blue light glasses are effective for glare reduction but will not prevent permanent eye damage. They filter the high-energy visible light from screens. I advocate evening use for this reason. Patients report less eye fatigue when using them during nighttime work. They won't solve all strain problems, though.
Effectiveness Factors
- Require 30-50% blue light filtration for measurable benefits
- Work best on LED/LCD screens emitting 400-495nm wavelengths
- Need proper fit with full coverage lens design
Optimal Usage Times
- Wear after 6PM to support natural melatonin production
- Use during 2+ hour continuous screen sessions
- Combine with bias lighting for enhanced glare reduction
Supplemental Solutions
- Pair with 20-20-20 rule breaks for comprehensive protection
- Combine with preservative-free artificial tear application
- Use alongside proper screen distance positioning
Clearly understand their restrictions. Blue light glasses do not block UV rays that damage the retina. Blue light glasses do not correct refractive errors, such as nearsightedness. I share this in consults so that patients won't set unrealistic expectations. The lenses complement other options.
Select high-quality lenses with an anti-reflective coating. A low-cost option often lacks proper filtration. Professional optical shops are recommended. Verify the filtration percentages before purchasing. Glasses should fit properly and be as close to the eyes as possible. This will prevent light from leaking in around the peripheral areas.
Integrate them with basic habits, i.e., use them at work during the day but maintain some distance from the screen. Apply artificial tears at regular intervals. I wear mine after dark during charting. They become one tool in your full arsenal against strain.
Read the full article: Prevent Eye Strain: Essential Relief Strategies
