He was fighting Glaucoma in the one eye, and his ophalmologist said it would eventually affect the other eye as well.
It is hard to believe that the KING as sexy as he was, really wasn't a very sexual person. He would rather talk to you, lay with you, make love to a woman was just not one of his important details. Leaving some to think he might have been impotent later in years, say 1975-77. Or by choice?
He also had gray hair. Which can be verified by Larry geller or patty perry if she did his hair at that time, unsure?