An ophthalmologist is a medical doctor who specializes in diagnosing and treating eye-related conditions.

Some ophthalmologists undergo a year or two of fellowship training specializing in one of the many subspecialties of ophthalmology, such as:

• glaucoma
• the cornea
• the retina
• uveitis
• refractive surgery
• pediatrics
• neuro-ophthalmology
• plastic and reconstructive surgery
• ocular oncology

Subspecialist ophthalmologists have usually completed training that allows them to work on eye conditions that are complex, involve a specific part of the eye, or affect certain groups of people. They also train more extensively than regular ophthalmologists to perform extremely intricate surgeries on delicate parts of the eye.