TIL in optics, astigmatism and stigmatism are antonyms. However, when you're talking about eyes, they're synonyms?? Plus, stigmatism can also mean having stigmata, which is a paranormal phenomenon and not something your eye doctor would know what to do with at all.
The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!