open-angle glaucoma vs chronic glaucoma

open-angle glaucoma and chronic glaucoma both are nouns.

Word	Noun	Adjective	Verb	Adverb
open-angle glaucoma	Yes	No	No	No
chronic glaucoma	Yes	No	No	No

As nouns, open-angle glaucoma and chronic glaucoma are synonyms defined as:

open-angle glaucoma and chronic glaucoma: glaucoma caused by blockage of the canal of Schlemm; produces gradual loss of peripheral vision

open-angle glaucoma (noun)	chronic glaucoma (noun)
glaucoma caused by blockage of the canal of Schlemm; produces gradual loss of peripheral vision	glaucoma caused by blockage of the canal of Schlemm; produces gradual loss of peripheral vision