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Sight

A deer's eyes are located on the side of their head, which has advantages and disadvantages. The advantage is that deer are able to view 310 degrees around itself. This wide view allows the deer to be totally aware of the surroundings, even when it is staring straight ahead.

The disadvantage is that deer cannot focus on one location with both eyes. This causes the deer to have very poor depth perception. Deer also see at a lower resolution than humans, and are believed to be color blind.

Deer are nocturnal animals. Nocturnal means that deer can see at night, which is one of the reasons they are more active at night. Deer have more light-detecting cells in their eyes than humans, which aids their nocturnal vision. Like other nocturnal animals, their eyes shine when exposed to light at night. This is due to a reflection off a special membrane in their eye.

It is believed that deer can also see in the ultraviolet light range, which is abundant during the earlier morning and late afternoon. This ability to see better, in early morning and late afternoon, helps to explain why deer are more active during these time periods.