A word for something which covers the eyelid of horses and lead them to run straight

I am looking for a word for a thing that covers the eyelid of horses and lead the horses to run straight without track distractions.

Something similar to funambulist.

Solution 1:

You mean blinkers/blinders?

Blinkers, sometimes known as blinders, are a piece of horse tack that prevent the horse seeing to the rear and, in some cases, to the side.

Blinkers are usually made of leather or plastic cups that are placed on either side of the eyes, either attached to a bridle or to an independent hood. Blinkers that have a peep hole cut in the back of the cup are known as visors.

Solution 2:

According to a slideshow at Daily Racing Form, there are (at least) five types of blinkers in use in U.S. horse racing: French cup, full cup, semi cup, cheaters, and extension cup. All five types attach to hoods that the horse wear during a race.

Cheekpieces are another option for obscuring parts of the horse's range of vision. There is a very nice picture of a horse wearing a cheekpiece, at the top of the article "Headgear and the Racehorse: Seeing the Wood from the Trees" at TrainerMagazine.com.

A third piece of vision-limiting equipment is the shadow roll, which attaches to the horse's noseband and makes it harder for the horse to see shadows on the ground in front of it.