glaucoma

1. An eye disease that damages the optic nerve and impairs vision (sometimes progressing to blindness) (synset 114278716)
   "contrary to popular belief, glaucoma is not always caused by elevated intraocular pressure"
   is a type of: eye disease - any disease of the eye
   subtypes:

   • acute glaucoma, angle-closure glaucoma, closed-angle glaucoma - glaucoma in which the iris blocks the outflow of aqueous humor
   • normal tension glaucoma - glaucoma that results from damage to the optic nerve although the intraocular pressure is normal
   • chronic glaucoma, open-angle glaucoma - glaucoma caused by blockage of the canal of Schlemm; produces gradual loss of peripheral vision

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