This seems to be my experience, now that I have hit that age. I'm able to read small print in bright light, but if its dim, forget it. Fortunately, I am able to read well enough that my medical does not require reading glasses. However, reading glasses are really cheap, like $5. I just stash a pair or two in the plane.
And back to the topic of ramp checks. I know there is a requirement to show AROW, but I didn't realize there was a requirement to show your reading glasses (compliance with the medical restrictions).