Pterygium: Under what condition might surgical intervention be pursued?

• A. If it starts to grow onto the cornea.
• B. If it completely regresses.
• C. If it is limited to the conjunctiva.
• D. If the patient refuses sun protection.

Answer: (A)

The main idea is that surgery is considered when the pterygium threatens the visual axis by extending onto the cornea. If it begins to grow onto the corneal surface, it can induce astigmatism, distort vision, or physically cover the pupil, making removal indicated. When the growth remains limited to the conjunctiva, or if it regresses, or if the patient declines sun protection, these are not solid reasons to operate. In short, corneal encroachment is the key surgical trigger.