winglets said...
Vision is ok.
You missed the joke, and fell into it. The ministers and doctors always told the boys that if you do "that" enough you'll go blind. But you must not be old enough to have heard that line.
As has been said many times to you, this is a support forum for those dealing with prostate cancer, not a Q&A session to keep the members from their own lives.
Address your own private medical questions to your physicians. We are not doctors here. Someday when you discover PCa (you will, but at a later age), come back and see us.