Quick answer: Bilberry's night-vision reputation has not held up in controlled studies. Astaxanthin at 6 to 12 mg a day has small trials suggesting less eye fatigue after screen work.
Bilberry
A popular story says pilots ate bilberry jam for night vision. Controlled studies have not confirmed a benefit. It is rich in anthocyanin antioxidants and may add to blood thinners.
Astaxanthin
A red carotenoid from microalgae. Small trials found improved focusing recovery and less eye fatigue in people doing screen work.
What this means
Both are supporting players; lutein and zeaxanthin are the core. See AREDS2.
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General information, not medical advice. Visivra is a dietary supplement and is not intended to diagnose, treat, cure or prevent any disease.