cortex vs lens cortex

cortex and lens cortex both are nouns.

Word	Noun	Adjective	Verb	Adverb
cortex	Yes	No	No	No
lens cortex	Yes	No	No	No

As nouns, cortex and lens cortex are synonyms defined as:

cortex (noun)	lens cortex (noun)
the tissue forming the outer layer of an organ or structure in plant or animal	the tissue that surrounds the lens nucleus
the layer of unmyelinated neurons (the grey matter) forming the cortex of the cerebrum
the tissue that surrounds the lens nucleus