Jason Alexander commented via Twitter that he ate an actual onion in this episode but a special onion boiled a few times to soften the flavor.
The only instance in the entire series in which the audience applauds at the first appearance/entrance of George Costanza (Jason Alexander).
The theft of writer Tom Gammill's glasses from a gym was the inspiration for George's predicament. Gammill's solution was to wear prescription goggles.
George (Jason Alexander) is eating a bag of Rold Gold Pretzels. He did commercials for Rold Gold Pretzels from 1992-1995.
Ron Howard's, father, Rance Howard, is in this episode playing a blind man. He makes another appearance in the series, as a farmer in episode 7.20, The Bottle Deposit (1996). Rance's son, and Ron's brother, Clint Howard, also had a role in Seinfeld - in episode 4.2, The Trip: Part 2 (1992), as Tobias, a car thief and person of interest as the serial killer.