I have been wanting to do some conditioning for my Kung Fu but I have heard things about damaging your eye sight from conditioning your fingers. How true is this? I have found many saying this but no real proof from anyone who has researched this. I can understand arthritis or other such things but I am not finding much linking finger conditioning or hand to loss of vision. My vision has been bad for many years now I got glasses in 5th grade and as time past it got worse. I would like to hear if anyone has a link or something that has medical proof that it can in fact cause eye damage.
I would also like to know if anyone had hand issues that were fixed by conditioning them as I have a bit of an issue with Trigger finger. I have never done any real serious conditioning with my hands only using sand filled bags once in awhile. Never had any real pain from it but my hand does give me some trouble.