IPA: /ˌɒfθælˈmɒlədʒɪst/
KK: /ɔfˈθælməˌlədʒɪst/
A doctor who focuses on the diagnosis and treatment of eye diseases and vision problems.
After experiencing vision issues, I made an appointment with an ophthalmologist.
Ophthalmologist → It is formed from "ophthalmos" (from Greek, meaning eye) and "logia" (from Greek, meaning study or science) and "-ist" (meaning one who practices or specializes in). An ophthalmologist is a specialist who studies and practices medicine related to the eyes.
Think of someone who specializes in the 'study' ('logia') of the 'eye' ('ophthalmos') — that's why an ophthalmologist is an eye doctor.