photoelectric cell vs electric eye

photoelectric cell and electric eye both are nouns.

Word	Noun	Adjective	Verb	Adverb
photoelectric cell	Yes	No	No	No
electric eye	Yes	No	No	No

As nouns, photoelectric cell and electric eye are synonyms defined as:

photoelectric cell and electric eye: a transducer used to detect and measure light and other radiations

Other synonyms of photoelectric cell include magic eye, photocell, photoconductive cell.

photoelectric cell (noun)	electric eye (noun)
a transducer used to detect and measure light and other radiations	a transducer used to detect and measure light and other radiations