It may contribute, but it's mostly about time spent indoors, not screens specifically. Research links rising childhood myopia to lots of close-up work (screens and books) combined with too little time outdoors, daylight appears to support healthy eye development. So screens are part of a bigger picture, not a single cause.
The protective steps are practical: make sure kids get plenty of outdoor time, hold devices farther away, take regular breaks from close work, and keep screen sessions reasonable. And get regular eye exams, catching and managing myopia early matters. This is general information, not medical advice; an eye doctor can guide a child's specific needs.
