Know how to use "fewer" and "less"? Find out.
"pertaining to the eye," early 18c., from Latin ophthalmicus, from Greek ophthalmikos "pertaining to the eye," from ophthalmos "eye" (see ophthalmo-).
ophthalmic oph·thal·mic (ŏf-thāl'mĭk, ŏp-)adj. Of or relating to the eye; ocular.
A descriptive term for the eye.