glaucoma

noun

1. an eye disease that damages the optic nerve and impairs vision (sometimes progressing to blindness)

   noun.state

   Examples

   Contrary to popular belief, glaucoma is not always caused by elevated intraocular pressure.

   Source: WordNet 3.0

2. Dimness or abolition of sight, with a diminution of transparency, a bluish or greenish tinge of the refracting media of the eye, and a hard inelastic condition of the eyeball, with marked increase of tension within the eyeball.

   noun

   Source: webster1913