HelloGiggles is letting us in on a little behind the scenes secret about The Big Bang Theory. Once you see it, you won't be able to un-see it. Look closely at Leonard's glasses. There are no lenses!
Actor Johnny Galecki says that he wanted the character to wear glasses and showed up wearing them when the mega-hit sitcom first started production. Glare from the lights kept showing up on-camera and the crew couldn't figure out what else to do, so they just popped out the lenses. The quick fix worked and, ten seasons in, Leonard Hofstadter, Ph.D. is still going strong with his empty frames.