I think you're talking about a bridle.
To bridle a horse properly, start by approaching the horse calmly and confidently. Hold the bridle in your dominant hand and gently guide the bit into the horse's mouth with your other hand. Slide the headstall over the horse's ears and adjust the crownpiece so it fits comfortably. Finally, fasten the throatlatch securely and check that the bridle is not too tight or too loose.
Bridle
Here are some sentences.She buckled the bridle over the horse's head.The horse's bridle was green.
There really is no part of a bridle that does that, however blinders are designed to keep the horse's attention focused ahead of him. It is up to the rider to keep the horse focused. The bridle is mostly just a means to hold the bit in place which allows communication.
The section behind the horse's ear is called the bridle path. It is called the bridle path because a section a the bridle is place there and the horse will be uncomfortable if the bridle path grows out too long. There is no specific name for the process of trimming the bridle path.
the horse rider directed the bridle to turn right.
The process of putting a bridle on your horse.
A bridle or a halter controls a horse when you are walking it or the horse.
A headpiece in horse terms typically refers to the part of the bridle that goes over the horse's head and includes the crownpiece, browband, cheekpieces, and throatlatch. It is used to secure the bridle in place and provide attachment points for reins and other pieces of tack.
A bridle mount is a hook, rack or similar device that you hang bridles on when the horse is not wearing them. A horse should never be tied up in a bridle because if it panics and pulls, it can damage its mouth. It should also never be left in a bridle unnattended. Most of the time, it should wear a halter and the bridle should be hanging up. You can also hang other leather strappings, lead ropes and halters on a bridle mount.
The jockey checked that the horse's bridle was properly on.