ROGER ANGELL/THE NEW YORKER

Check me out. The top two knuckles of my left hand look as if I’d been worked over by the K.G.B. No, it’s more as if I’d been a catcher for the Hall of Fame pitcher Candy Cummings, the inventor of the curveball, who retired from the game in 1877. To put this another way, if I pointed that hand at you like a pistol and fired at your nose, the bullet would nail you in the left knee. Arthritis.

Now, still facing you, if I cover my left, or better, eye with one hand, what I see is a blurry encircling version of the ceiling and floor and walls or windows to our right and left but no sign of your face or head: nothing in the middle. But cheer up: if I reverse things and cover my right eye, there you are, back again. If I take my hand away and look at you with both eyes, the empty hole disappears and you’re in 3-D, and actually looking pretty terrific today. Macular degeneration. MORE…