I started needing reading glasses around 40. I didn't realize it at first, but it seemed every time I sat down to read a book or magazine or..... whatever, I would feel sleepy pretty fast. Later, something prompted me to try some "readers" and I found everything was so much clearer, I then realized that even though the print didn't look blurry to me, my eyes were changing and were struggling to focus, therefore I was getting that tired feeling. I was happy it was such an easy fix as here you can get good readers even at the drugstore or department stores. Every few years, I need a little stronger. Now I have a pair of them everywhere ! Can't read labels or prices or menus without them.