Devices such as tablets, smartphones and laptops can reflect ultraviolet light from the sun and may indirectly increase users’ exposure to the cancer-causing wavelengths, according to a new study. “These devices are generally used for communication or entertainment, so it can be easy to overlook their reflective properties unless you happen to catch the glare off a screen,” said Mary E. Logue of the University of New Mexico in Albuquerque, who co-authored the research with Dr. Barrett J. Zlotoff.