In today’s technologically advanced world, it has become increasingly common to spend hours staring at computer screens, tablets and smart phones. According to local experts, staying glued to technology for long periods of time may ruin a person’s eyesight. Dr. Tyson Tanner, optometrist for Southwestern Eye Center in Phoenix and Sun City, calls this condition “square eyes,” a non-literal term used to describe strained or tired eyes, which result from constantly using electronic devices. “The more time we spend staring at our screen the more fatigued our eyes focusing system becomes and the more uncomfortable our vision becomes,” Dr. Tyson Tanner says. Headaches, eyestrain and eye fatigue are common symptoms of experiencing square eyes. Although the condition is not permanent, Dr. Tanner offers great tips for proper visual hygiene that would prevent someone from having square eyes: