Hey!

Ophthalmology is a branch of medicine dealing with the diagnosis, treatment and prevention of diseases of the eye and visual system.

The eye, its surrounding structures and the visual system can be affected by a number of clinical conditions. Ophthalmology involves diagnosis and therapy of such conditions, along with microsurgery.

Various types of departments in Opthalmology are:

• Anterior Segment Surgery. This subspecialty focuses on the anterior segment of the eye, which includes the cornea, iris, ciliary body, and lens.
• Cataracts and Refractive Surgery.
• Cornea and External Disease.
• Glaucoma.
• Neuro- Ophthalmology .
• Ocular Oncology.
• Oculoplastics and Orbit Surgery.
• Ophthalmic Pathology.

According to your question, if you are asking that how to study opthalmology then: In order to become an ophthalmologist, students typically complete a bachelor's program, a 4-year Doctor of Medicine (M.D.) program and a 3-year ophthalmology residency in a hospital

Hope this helps!