Use red or red-plus-near-infrared light early in the day for brief eye exposure, typically about 1–3 minutes per session from a comfortable distance, a few times per week or daily for short periods. The practice is aimed at adults over 40 with age-related vision decline, and is thought to help photoreceptor mitochondria function better, potentially supporting visual performance and slowing age-related loss.
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“They had people, subjects that were either younger, so in their 20s, or 40 years old or older, view red light of about 670 nanometers. 670 nanometers would appear red to you and me. They had they had them do that, excuse me, at a distance that was safe for their eyes. So at about a foot away. And they had them do that anywhere from 2 to 3 minutes per day.”
Andrew Huberman · Using Light (Sunlight, Blue Light & Red Light) to Optimize Health | Huberman Lab Essentials · Feb 26, 2026 · 30:19 · YouTube ↗