Oculist

In the Gatsby there was a large billboard, an old advertisement with a pair of large optical glasses watching the carrying-ons, which represented a higher spirit observing and maybe judging, but not acting.

Back in the day an optometrist was called, not called an optician but an oculist. Not to be confused with a occultist

One wonders when and why the name change? Maybe they were sick of being accused of dabbling in the eye arts.