Did George Lucas Put a Mickey Mouse Head in "The Empire Strikes Back"?

GEORGE LUCAS' relationship with Disney is relatively new, but his LOVE for Disney goes way back. This went unnoticed for a long time, Lucas slipped an homage to Disney into the "Star Wars" movie "The Empire Strikes Back" . . . which came out 33 YEARS AGO. Someone just discovered that during the fight between Luke Skywalker and Darth Vader, there's a crystal Mickey Mouse head clearly visible in the background.