1. The profound and neat total loss of all sight. It is classified by WHO as having less than 20/400 vision. 2. The absence of any usable vision except for perception of light. See cortical blindness- functional blindness- low vision- visual.

BLINDNESS: "Joe's blindness was the result of an accident."
Cite this page: N., Pam M.S., "BLINDNESS," in, April 7, 2013, (accessed September 28, 2021).