Keratoplasty is the surgical procedure on which tissue?

• A. Conjunctiva
• B. Cornea
• C. Retina
• D. Lens

Answer: (B)

Keratoplasty is a surgical procedure on the cornea, the clear, dome-shaped front part of the eye that helps light focus onto the retina. In a corneal transplant, damaged corneal tissue is replaced with healthy donor tissue to restore clarity and vision. This targets the cornea specifically, not other eye structures. For context, the conjunctiva is the thin membrane covering the white of the eye and inner eyelids, the retina is the light-sensitive layer at the back of the eye, and the lens sits behind the iris to focus light onto the retina. Keratoplasty can involve replacing the whole thickness of the cornea (penetrating keratoplasty) or just some layers (lamellar keratoplasty), depending on the condition.