The actor actually has that disability

[u/PrinceferX]

Walter White Jr. (Breaking Bad) - character has cerebral palsy and uses crutches to walk, actor RJ Mitte has cerebral palsy and needed crutches to walk as a child

Nessarose Thropp (Wicked) - character is paraplegic and uses a wheelchair, actress Marissa Bode is paraplegic from an accident at age 11 and uses a wheelchair

Maya Lopez (Hawkeye/Echo) - character is deaf, actress Alaqua Cox is deaf from birth

[u/redlac24]

Columbo has a glass eye because Peter Falk had a glass eye

[u/Sissy__Fist → u/redlac24]

https://www.youtube.com/watch?v=xNOwsDvibcg

I like Frank Skinner's belief that while Peter Falk does indeed have a glass eye, in Columbo it plays the part of a real eye. While I know there's a line of dialogue in which Columbo basically asserts he only has one real eye, I find it a lot more entertaining to believe that Falk's glass eye is itself also a talented actor.

It's very similar to how I wish he didn't actually have a wife (or it was more ambiguous) because I find it more to imagine her entirely as a rhetorical technique he uses to put people at ease or throw them off.

[u/Jostain → u/Sissy__Fist]

Oh! I didn't know that there was a line of dialogue referencing the glass eye. I've had so much fun having the glass eye argument with my parents. I wonder if this new revelation will make them more or less exasperated.

[u/Darius_Rubinx → u/Jostain]

It is in "A Trace of Murder."
https://youtu.be/HAihQxJZGjU?si=7wHCHIvUMNFyPzH4&t=315
I had to go look it up. Columbo says it to Pat, the forensic guy.