Question

Why are people who have recently undergone eye surgery advised to wear black sunglasses? Does the intensity of light pose any harm to the eyes? How do black sunglasses prevent entry of light in the eyes?

Answer 1

Answer:

People who have recently gone eye surgery, wear black sunglasses in order to give comfort to their pupil (which cannot move efficiently, immediately after the surgery) even the sunlight when light's intensity is very high.

Explanation:

In order to protect their eyes, they wear only black sunglasses because the black color on one side, does not let the bright light enter the eye, also on the other side, it provides less irritation to the eye due to very less wavelength.