Advances in vision therapy and the understanding of neuroplasticity—the brain’s ability to adapt—have opened the door for effective treatment at any age.
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Can Amblyopia (Lazy Eye) Be Treated in Adults?

Advances in vision therapy and the understanding of neuroplasticity—the brain’s ability to adapt—have opened the door for effective treatment at any age.
[…]
Binocular vision dysfunction develops due to an imbalance in the muscles controlling your eye’s movements. This leaves your eyes unable to properly focus and work together, making it significantly more difficult to focus on objects and keep your vision clear. […]
Despite having two eyes, when you look at something, you only see one image. It’s because your eyes work together […]