There are five common reasons to wear sunglasses.
It can protect you from sun damages, specially UV blocking which can cause cataracts, Eyelid cancer, and age-related macular degeneration.
It can protect you from weather such as snow, sand, wind, and dust that can irritate and damage your eyes.
It can prevent you from Headaches and Migraines. This reaction comes due to light sensitivity which can create pain and irritation.
It can save you in Driving by reducing glare, light can reflect off these surfaces and send light rays directly to your eyes. It can cause a strain and it make harder to see when you are driving.