For ur information i have read quran! Where does it say in Quran, if u donate ur eyes u will be blind in jannat??? Get a reality check
Where does it say in quran you have to donate your organs of your body which is his Amanat??? Get a reality check.
Have you read in quran that this body is not ours its his amanat.
If we will do anything to hurt any part of the body. That part on the judment day will tell Allah what we did.