Retina is where the highest concentration of DHA is present in human tissues, who accounts for 60% of the unsaturated fatty acids in retina. DHA plays an important role in maintaining vision.
Dry eye disease is becoming more frequent and affects our dailylife.
A 90-day nutritional intervention trial in 12 patients with moderate dry eye disease showed that EPA+DHA intake was effective in reducing symptoms. The analysis concludes that DHA can be metabolized in human body to produce neurocytoprotectin and D-series anti-inflammatory factors. [1]

[1] Omega-3 supplementation is neuroprotective to corneal nerves in dry eye disease_ a pilot study