01/08/2025
Is your horse’s nighttime vision better than your daytime vision?
When comparing equine vision to human vision, the horse has a smaller visible spectrum (see image) which means they see a smaller range of colors than we do. However, horses have a structure in the back of their eye—called the tapetum lucidum—that humans do not have. This enhances vision in low light conditions and allows a horse to see better in the dark than a human does. However, reflections from the tapetum lucidum can also blur images and lead to poor depth perception at night.
Dilation of the pupil allows all species to see better in the dark. This process takes longer in a horse (45 minutes) than it does in humans (25 minutes). So, when a horse is asked to do something in a dark environment, it’s important to allow their vision proper time to fully accommodate.
Overall, the nighttime vision of a horse is better than the nighttime vision of a human. However, the horse’s nighttime vision is NOT better than the daytime vision of a human. Anytime you are asking your horse to function in a dim light situation, give them time to adjust. And if they are fearful, be patient and try to understand how things look from their perspective!
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Brought to you by the AAEP Horse Owner Education Committee
