In ophthalmology, high-energy visible light (HEV light) is high-frequency light in the violet/blue band from 380 to 500 nm in the visible spectrum. HEV light has been implicated as a cause of age-related macular degeneration.
Some sunglasses are now designed specifically to block HEV.
Read more about High-energy Visible Light: Blue-light Hazard
Famous quotes containing the words visible and/or light:
“While it is generally agreed that the visible expressions and agencies are necessary instruments, civilization seems to depend far more fundamentally upon the moral and intellectual qualities of human beings—upon the spirit that animates mankind.”
—Mary Ritter Beard (1876–1958)
“Oh! for a closer walk with God,
A calm and heav’nly frame;
A light to shine upon the road
That leads me to the Lamb!”
—William Cowper (1731–1800)