What type of medical professional specializes in diagnosing and treating eye diseases?

The correct choice indicates that an ophthalmologist specializes in diagnosing and treating eye diseases. This is a crucial distinction because ophthalmologists are medical doctors who have completed extensive training in the field of eye care, including medical and surgical treatment of eye conditions. They have the authority to perform surgeries on the eye, prescribe medications, and manage complex eye diseases.

In contrast, an optometrist primarily provides vision care, including eye exams, vision testing, and management of common eye conditions, but they do not perform surgeries. An optician is trained to fit and dispense glasses and contact lenses based on prescriptions from optometrists or ophthalmologists, and they do not diagnose or treat eye diseases. A general practitioner provides primary care but may not have the specialized training required to address specific eye health issues. Therefore, an ophthalmologist is the only professional in the list with a comprehensive medical education focused on the eyes, making them the expert for diagnosing and treating eye diseases.