Nerf does not recommend its bows and arrows for children under 8 years old. Nerf's website cautions users to never modify Nerf darts or aim Nerf bows at eyes or faces.
Some Nerf bows and arrows fire darts up to 100 feet. A shot that powerful can cause severe eye damage.
Any toys that fire projectiles carry a risk of eye injury, a fact that most parents don't consider when buying toys. According to the U.S. Consumer Product Safety Commission, toy-related injuries account for 250,000 emergency room visits ever year in the United States, and almost half of these injuries are to heads, faces or eyes.