Eye problems caused by computer use fall under the heading computer vision syndrome (CVS). It isn’t one specific problem. Instead, it includes a whole range of eye strain and pain. Research shows that between 50% and 90% of people who work at a computer screen have at least some symptoms.
Working adults aren't the only ones affected. Kids who stare at tablets or use computers during the day at school can have issues, too, especially if the lighting and their posture are less than ideal.