According to the World Health Organization, babies and toddlers should not passively watch computers, TVs, and other screens before they get to age 2. Instead, they should be physically active or if they are newborns, sleeping for 14-17 hours daily. In America, experts advise that children under 18 months should not use screens, while Canadian experts restrict access to screens for children under age 2. Although studies are inconclusive about the effect of computer screens on the eyes, emerging literature indicates that eye fatigue in children who spend many hours in front of the computer screen can lead to premature nearsightedness.