chronic glaucoma vs open-angle glaucoma

chronic glaucoma and open-angle glaucoma both are nouns.

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

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

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

chronic glaucoma (noun)	open-angle 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