Because UV light is damaging for the retina, dumbass! Maybe people born in hot countries have tolerance, but my eyes start hurting after a minute in bright sun. Only wear sunglasses with UV certification and bought from a reputable retailer.
Why are you wearing sunglasses?
https://blossom.primal.net/929a39aacea602223637ec8fe4976169b36c7a24c0be761b3a6ebc8dfffc5c4e.mov
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Wonder why they hurt... Ditch the glasses and let your eyes heal.
You people are fucking insane. I was born in a NORTHERN country and now am living much closer to the equator. My eyes only hurt when I DON'T wear grasses outside in the bright sun. Muting you.
I was born and live in a nothern country, also frequently travel to the tropics and have no issues with it.