Nonsense! You're eyes adjust to very low light levels, far below what a 60W bulb outputs in lumens.
60W was enough for me a decade ago. Now for fine work I need 100W. I can still see with 60W, but what was enough for fine work a decade ago is not enough now. I understand this will get worse as I get older. I don't have any particular visual conditions; I'm just aging.
Indeed I have no trouble with low light (yet!), but just because I can read a book with a single 60W bulb in a living room doesn't mean I want to.