Lazy Eye (Amblyopia): Everything You Need To Know Parents often observe that their child relies more on one eye than the other. This often leads to the question: What causes a Lazy Eye condition? Amblyopia develops when the brain begins to favor one eye over the other. As a result, https://www.deviantart.com/eyeheal/journal/What-Is-Lazy-Eye-Amblyopia-and-How-Is-It-Treated-1343237669