Docosahexaenoic Acid (DHA) is an omega-3 polyunsaturated fatty acid that is a major structural component of the retina in the eye. Its role in supporting eye health, particularly in visual development and function, is well established by scientific research. DHA is highly concentrated in the photoreceptor cells of the retina, where it contributes to membrane fluidity and optimal functioning of vision-related cell signaling pathways.

Multiple studies have shown that adequate DHA levels are essential for normal visual development in infants. For example, randomized controlled trials have demonstrated that infants supplemented with DHA-enriched formula have improved visual acuity compared to those receiving formula without DHA. Additionally, some epidemiological studies suggest a protective effect of higher dietary omega-3 intake, including DHA, against age-related macular degeneration (AMD), although results have varied and some large trials have not confirmed a strong preventive benefit for AMD.

Overall, the use of DHA to support eye health, especially for early visual development, is scientifically validated. It is recognized by health authorities such as the European Food Safety Authority (EFSA), which allows the claim that DHA contributes to the normal visual development of infants up to 12 months of age. For adults, while the evidence is less definitive regarding disease prevention, the biological plausibility and some supportive data justify its use in maintaining general eye health.