Deer can see 360 degrees around; but they lack front vision. In fact, deer vision is only 20/100 during the daytime; and they do much better at night.
Because deer vision is so poor, Deerbusters recommends adding white warning banners to the deer fence to let white-tailed deer know that a structure is near. Whitetails have trouble seeing the black color of the fence mesh; but they can easily detect the white color on the deer warning banners. We recommend that you tie one white warning banner on the fence for every 10 feet at a height of 4 feet. Avoid adding warning banners to the top of the fence -this allows the deer to gauge how high they need to jump to get to your garden. Deer warning banners come 50 to a pack, at 1 inch x 24 inches.