Red shrank her pupils after being caught in a Do the Sashay song virus with the cactus.
Rock and Roll monster's eyes are almost shut, but they erect when they are singing.
An example of an animated muppet eye.
A caffeinated cow on Sesame Street.
The muppet eyes from each muppet on Avenue Q.
An eye mechanism used on Mad Monty in Muppet Treasure Island.
Say cheese: the Happiness Hotel gang.
Bert naps onscreen thanks to modified eyelids
Bobby Benson using a jack hammer.
Bobby Benson with the babies in The Muppets on it's finale.