retina vs macula

retina and macula both are nouns.

Word	Noun	Adjective	Verb	Adverb
retina	Yes	No	No	No
macula	Yes	No	No	No

retina (noun)	macula (noun)
the innermost light-sensitive membrane covering the back wall of the eyeball; it is continuous with the optic nerve	a small yellowish central area of the retina that is rich in cones and that mediates clear detailed vision
	a patch of skin that is discolored but not usually elevated; caused by various diseases
	a cooler darker spot appearing periodically on the sun's photosphere; associated with a strong magnetic field