High-energy Visible Light

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:

    But real action is in silent moments. The epochs of our life are not in the visible facts of our choice of a calling, our marriage, our acquisition of an office, and the like, but in a silent thought by the way-side as we walk; in a thought which revises our entire manner of life, and says,—”Thus hast thou done, but it were better thus.”
    Ralph Waldo Emerson (1803–1882)

    But no. Too soon I voun’ my charm abroke.
    Noo comely soul in white like her—
    Noo soul a-steppen light like her—
    An’ nwone o’ comely height like her—
    Went by; but all my grief agean awoke.
    William Barnes (1801–1886)