Over-use of sharingan techniques will eventually cause blindness, rendering the eye's power useless. To prevent this, the user needs to replace his eyes with someone else's, giving him Eternal Mangekyo Sharingan, which do not suffer the same issue.
Use lenses or photoshop
He wasn't born with Sharingans. He collect Sharingans from the Uchiha Massacre and by the help of Orochimaru he implanted Sharingans in his hand and one eye along with First hokage cell for chakra.
yes! smoking can make you go blind. How? there are over 3,000 chemical's that go into your bloodstream which could make you have poor eyesight/go blind.
Paul went blind.
it depends what venom it is like if its a cobra you will go blind
It won't make you go blind - but - staring at the Sun for any length of time will damage your eyesight.
Dogs can go blind from glaucoma or from advanced cataracts.
people get blind and some times get deaf also..............
yes
yes
why yes they do
GOD time also works