More than 2,000 children between ages eight and 18 reported that, on an average day, they spent approximately 7.5 hours using devices with LED displays in academic and leisure activities. Researchers at University Complutense of Madrid in Spain analyzed and compared the results of two previous studies. The first showed a 23 percent increase in retinal cell death in mice exposed to high energy light without protective filters. The second found that children received three times more light of short wavelength. Children’s arms are short, exposing them to high energy light at a shorter distance than an adult who uses the same hand-held device. The scientists warn that we could face increased blindness in world populations.