Reviewed by Jessie, BSc Biomedical Science · Formulation Lead, Purest Kids
DHA in the retina
DHA is concentrated in two places in the human body above all others: the brain and the retina. In the retina, DHA makes up roughly 50–60% of the total fatty acid content of photoreceptor outer segments — the cells responsible for detecting light and converting it to visual signals.
This structural role begins in utero and continues through childhood. The retina is not fully developed at birth, and photoreceptor cells continue to differentiate and mature during infancy and early childhood. Adequate DHA supply during this period supports that developmental process.
What the research shows
Multiple studies have examined the relationship between DHA intake and visual function in children. Research has shown associations between higher DHA status and improved visual acuity in infants, and relationships between omega-3 fatty acid status and visual processing speed in older children.
The mechanism is reasonably well understood: DHA affects the fluidity of photoreceptor membranes, which influences how efficiently rhodopsin — the visual pigment — signals in response to light. Less DHA means less fluid membranes, which means reduced signalling efficiency.
The Singapore context
In a high-screen-time environment like Singapore, where children often spend significant hours on digital devices from an early age, foundational nutrition — including DHA — supports the retinal structures that process visual information regardless of source.
A note on claims
The evidence supports DHA's structural role in the retina and associations with visual acuity during the developmental period. It does not support claims that supplementation will cure visual problems or reverse myopia. The argument is for adequate supply during a critical developmental window — not supplementation as a visual intervention.
Omega-3 Mango Burstlets — 450mg DHA, algae-sourced, for ages 3+ →
References
- SanGiovanni JP, Chew EY. "The role of omega-3 long-chain polyunsaturated fatty acids in health and disease of the retina." Progress in Retinal and Eye Research, 2005.
- Innis SM. "Dietary omega 3 fatty acids and the developing brain." Brain Research, 2008.