Just 15 minutes of fully clothed infrared sunlight exposure triggered systemic effects and measurable improvements in vision — even with eyes completely covered.
A new study published in Scientific Reports titled, Longer wavelengths in sunlight pass through the human body and have a systemic impact which improves vision, confirms what animal studies have long suggested: longer wavelengths of sunlight—particularly in the infrared range (830–860 nm)—can penetrate the human body and improve mitochondrial function systemically. Remarkably, even 15 minutes of back exposure (fully clothed) improved vision 24 hours later — without any light entering the eyes.
