Connie's Glasses

In the episode "An Indirect Kiss", Steven accidentally heals Connie's eyesight through his magical saliva, although Connie continues to wear her glasses (albeit with its prescription lenses removed) as she's afraid of explaining to her parents how her eyesight got magically fixed. It wouldn't be until during the events of "Nightmare Hospital" that Connie finally tells the truth to her mother.

Example of:
Purely Aesthetic Glasses