What is put on the side of a horse's eyes in the picture?

Ken, blinkers in the UK

Blob, I've only ever heard them called blinkers. It's a uk thing 😊

Blob, I agree. never heard them called blinkers before. only answer that made any sense, still a guess.

first time hearing them referred to as blinkers. blinders, yes.

Blinders in the US. Kept city delivery horses from getting spooked by the street traffic.

Blob, out of curiosity what do you yanks say instead of someone having a "blinkered view" of something? It means having a narrow, parochial attitude like only accepting what you know as correct.