blind spot vs optic disc

blind spot and optic disc both are nouns.

Word	Noun	Adjective	Verb	Adverb
blind spot	Yes	No	No	No
optic disc	Yes	No	No	No

As nouns, blind spot and optic disc are synonyms defined as:

blind spot and optic disc: the point where the optic nerve enters the retina; not sensitive to light

Other synonyms of blind spot include optic disk.

blind spot (noun)	optic disc (noun)
the point where the optic nerve enters the retina; not sensitive to light	the point where the optic nerve enters the retina; not sensitive to light
a subject about which you are ignorant or prejudiced and fail to exercise good judgment