My dad suffered from glaucoma so he underwent trublectomy.After a week or so he was able to see.His Vision had become a bit clear.However after a few days his operated eye became red and he developed photophobia.So we were told by the doctors that his corneal cells weren't working and now he has almost lost his vision of the operated eye.We know that he has to undergo a corneal transplant but the doctors say that rate of graft rejection would be high in his case as his eye structure s different.