samurai is right
It is NOT usually to prevent the horse from being spooked, especially at the carriage! WHen you ride a horse with loose rein, you'll notice that most horses like to look around at their surroundings. They like to know what is around them and what is going on for their own safety, its instinct. The blinders or blinkers re to keep the horses looking int the direction they are being asked to go, straight ahead, instead of around at their surroundings. Horses are just like us, they tend to travel wheichever direction they are looking. If the driver constanty has to saw back and forth to keep the horse traveling straight, its a hassle!
horse trainer 12+ years, over 36 horses, pro-rodeo competitor 11 years, vet student, equine animal science degree- Auburn University