I just picked up my first pair of prescription eyeglasses, which I think is my first unwelcome concession to getting old. They include an astigmatism correction which is currently making the ground seem to float about six inches higher than it ought to, which makes me feel short and makes me keep tripping off steps.
Sigh. It's perhaps not a good thing how I have taken pride, up to now, in being a person with good eyesight.