Being nearsighted and farsighted are some of the disorders that happen in our eyes. But why is it happen to our eyes? What are some causes of it?

    

Well basically it happens because of the damage caused to our retina due to carelessness shown by us in taking proper care of our eyes.Its causes include blurred vision and hence the objects do not appear clearly.We are not able to see far and near objects in these defects.These can only be cured by wearing suitable types of spectacles that provide clear eye sight.

A little away from what is being posted here,
Last month a blood vessel burst in my mothers eye.
Her whole left eye was part filled with blood.
There was no pain.
There was no difference in eyesight.
It was caused by 'too much stress' as the doctor finally put it.
What a scary experience it was!
It has been about 4 weeks now, and there are still traces of blood in the eye

Besides nearsighted and farsighted problem there are host of other eye problem.
Eye twitching: It is a very common problem but mainly goes unnoticed.
Itchy eyes: When eyes get dry, it itches. Wet it a little.
Tired eyes: Time to sleep.
Age-related problems: Always visit your doctor when problems start and not when it starts hurting you.