What could cause a child to be suddenly near-sighted? Complete vision exam with well-respected optometrist 1 year ago showed he had 20/10 vision, and this week it was 20/60. Took him to a pediatric ophthalmologist who said the first person must not have known what they were doing (because she wasn't a "real doctor", just an optometrist) and he must have always been near-sighted, but this all started after pink eye two weeks ago. He's squinting when he never used to squint. Can pink eye cause that much damage? Can children's eyes change that fast? No one in our family wears glasses so we don't have much experience.