In ophthalmology, high energy visible light (HEV light) is high frequency light from 380 nm to 530 nm in the visible spectrumDykas, Carol. How to Protect Patients from Harmful Sunlight. www.2020mag.com. June, 2004.. HEV light has been implicated as a cause of age-related macular degenerationGlazer-Hockstein C, Dunaief JL. "Could blue light-blocking lenses decrease the risk of age-related macular degeneration?" Retina. 2006 Jan;26(1):1-4. PMID 16395131Margrain TH, Boulton M, Marshall J, Sliney DH. "Do blue light filters confer protection against age-related macular degeneration?" Prog Retin Eye Res. 2004 Sep;23(5):523-31. PMID 15302349.

Some sunglasses are now designed specifically to block HEV.

References