I suspect my father has presbyopia, so I am wondering if he needs to receive correction. His eyesight has been gradually deteriorating for some time now, and he says he can't see well, so I suspect it might be presbyopia. In this case, is correction possible, or does he need surgery? He seems to be experiencing discomfort due to presbyopia, so I would like to get it corrected for him, but I am wondering what criteria I should use when choosing an ophthalmologist.