It Does Not Change. Lazy eye, or amblyopia results from any one of several causes during early childhood. The eyes can be crossed or turned out which causes double vision. The brain will not tolerate double vision and so basically "turns off" one eye. Other causes can be a huge difference in the optical prescription between the two eyes. After about age 5 there usually is no correction for this.
It remains lazy. Lazy eye, or amblyopia, results from misalignment, excess refractive error or other disease of that eye. Repair of the offending condition in the first months of life can prevent amblyopia. Although the severity of the faulty information to the brain may vary, the lazy eye may be forever ignored by the brain. Over years, a lazy eye may turn in or out, since good vision is required for alignment.