I am 45 now, been wearing glasses since I was 30 or so. First pair I got the prescription stayed the same for about 3 or four years until they changed. Doc kept tellin me that when I had to get bifocals it would change more often. Got them about year and a half ago. They gotta be replace now. Wife just made me and her an appintment. I started off with the invisible bifocals and love them, but doc told me if you had already started wearing the regular kind you prolly would not be able to make the adjustment to the invisilines. I got the photo gray and everything in mine cuz I am always out in the sun. Gettin old sucks sometimes lol.

