What Is Lazy Eye (Amblyopia) And How Is It Treated? Many parents notice their child struggling with vision or favoring one eye. 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