While appearing in Star Trek: La serie original (1966)'s second pilot episode, Where No Man Has Gone Before (1966), he was required to wear heavy silver contact lenses for his character. Lockwood had difficulty wearing the lenses as they were heavy, thick, and only had one tiny hole for him to see through. He claimed, afterward, that the lenses were to blame for his later vision problems.
I'm an actor. I've done a little bit of everything. An actor is kind of
like a cowboy. The show's over on Sunday and then you ride off to the
next gig. Basically, that's what show business is all about.