I've been unlucky enough to need glasses since I was a wee lad, and have always worn them while photographising. I tried using the dioptric converter in they eyecup of my camera, but didn't like adjusting for being able to see through the lens, to blind when I take it away from my eye. Taking glasses on and off is a bit of a faff too, so I never really tried to persevere and went straight back to shooting while wearing specs. I happened across some advice in a manual that said when not using the eyepiece, a cover should be attached to prevent any stray light from affecting the image. Is this overkill? Are you a glasses wearer that takes them off when using a camera?