Dad is 73 years old. He has been told to have surgery to remove the cataract in this eye. Dad has dementia and is a very stubborn man, set in his ways. We are afraid that after the cataract surgery, he might rub his eyes continuously if he feels uncomfortable and makes things worse. I read about drops available online to help remove cataract. But since it is not the popular and widely recommended option, I have my reservations against that. My question being, if the cataract remains untreated, will it get worse to the point where he won't be able to see again? Dad does not drive or is expected to do anything that requires a great deal of clarity in vision.