Well, that is correct. But what “They” don’t tell you is it pretty much happens the DAY you turn 40. So you might as well go ahead and buy some, because you won’t be able to read without them.
Also, you’ll need several pair. My husband has them strewn all over the house. The light was hitting this broken pair (and yes, he still keeps them) in such a beautiful way this morning, I had to use it as my photo of the day.