Meaning of retinitis pigmentosa

retini'tis pig•men•to'sa

Pronunciation: (pig"men-tō'su, -mun-), [key]
— Ophthalm. Ophthalm.
  1. degeneration of the retina manifested by night blindness and gradual loss of peripheral vision, eventually resulting in tunnel vision or total blindness.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.