AI Summary

Karl, a 28‑year‑old from the northeastern United States, underwent brain surgery and now reports a visual phenomenon in which he perceives cat‑like features on human faces. He says that after seeing his gray tabby Luna first thing each morning, he later notices almond‑shaped eye sockets, enlarged pupils and striped patterns on the faces of people he meets in person or online. The experience varies day to day, occurring on some days but not others.

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