By doing things like reading in the dark and (if you already have glasses) not wearing them or wearing them when not needed. Also, it can just be genetic.
Also staring in bright light for long and not wearing sunglasses in the sun, looking at brightly/sharply reflecting objects, using your phone or computer in insufficient lighting and not eating right foods that improve or make your eyes better: carrots, broccoli and Brussels sprouts, sweet potatoes, spinach, turkey, sardines and more. These foods provide vitamin C, Omega3 fats and zinc (plus the B-vitamin niacin, which specifically protects against cataracts).
I say you would have to lose half of your blood to lose consencnes, not sure about eyesight
never
No
No
You will lose that heightened response in due course of time. This is the normal course of action. There can be exceptions to this.
yes you can
Clara Barton temporarily lost her eyesight due to nervous exhaustion but she recovered a few years later.
He did not lose his sight; his eyesight is poor, and he just likes to wear prescription sunglasses.
Mangekyo Sharingan causes you to lose your eyesight.
I have never heard of that happening. As far as I know, eyesight has nothing to do with you having or not having your wisdom teeth.
Yes you will get hairy palms and lose your eyesight.... which is so not true, by the way.
around 40,000 to 45,000 every year.