-oph·thal·mus
\ˌäfˈthalməs, ÷ˌäpˈth-\  noun combining form 
Etymology: New Latin, from Greek -opthalmos, from ophthalmos eye — more at ophthalmia 
1. : one having a (specified) kind of eye  — in generic names usually of arthropods
< Megophthalmus >
2. -es : eyes of a (specified) form or in a (specified state 
< megalophthalmus >
1.
< Megophthalmus >
2. -es
< megalophthalmus >