Eye Health & Digital Strain

Lutein and zeaxanthin are carotenoids that concentrate in the macula of the retina, forming the macular pigment that protects against blue-light and oxidative damage. The landmark AREDS2 trial established their role in slowing progression of age-related macular degeneration. Trials in younger adults also show improvements in contrast sensitivity, visual performance, and digital eye strain endpoints. The 10:2 mg ratio matches the AREDS2 formulation.^{[1, 2, 3]}

DHA is the most abundant fatty acid in retinal photoreceptors — adequate DHA status is required for normal visual function. Multiple trials show omega-3 supplementation reduces dry-eye symptoms and signs, particularly in adults with high screen exposure. Effect builds over 8-12 weeks.^{[4, 5, 6]}

Astaxanthin is a carotenoid antioxidant with documented effects on accommodation (focusing) ability and asthenopia (eye fatigue) in high-screen-time adults. Small randomized trials show improvements in visual fatigue scores and ciliary muscle function. Fat-soluble — must be taken with food.^{[7, 8, 9]}

The AREDS2 trial established that this combination slows progression of intermediate-to-advanced age-related macular degeneration. Most useful as a preventive baseline if you have AMD risk factors (family history, age 50+, smoking history). For younger adults without AMD risk, a balanced multivitamin covers these adequately.^{[2, 10]}

Bilberry is heavily marketed for vision but the human evidence is genuinely thin. WWII RAF pilots eating bilberry jam to improve night vision is folklore — controlled trials have not consistently demonstrated this. Small trials show some benefit for asthenopia and contrast sensitivity. Treat as the most speculative item — skip if you want a lean stack.^{[11, 12]}