Amblyopia happens when the brain prefers one eye to the other. The brain’s preference can weaken and reduce vision in the eye that is less used.
Eye problems that can cause this to happen are:
Eyes that are not aligned
Having a large difference in sight between both eyes
Vision problems at birth, such as a cataract or droopy eyelid
This problem is often noticed during childhood. Things that may raise the risk of this problem are:
Being born very early
One or both eyes that turn outward or inward
Some people may not have symptoms. Others may have:
Difficulty telling how near or far an object is
Shutting one eye when looking at things
Eyes that cross
The doctor will ask about your symptoms and health history. An eye exam will be done. Vision in each eye will be tested. This is often enough to make the diagnosis.
Any underlying eye problems will need to be treated, such as removing a cataract.
The goal of treatment is to correct vision. This is done by forcing the brain to use the weaker eye so that it gets stronger. This should be done as early as possible to lower the risk of lifelong vision problems.
Occlusive therapy—Covering the stronger eye with a patch or covering the eyeglass lens of the stronger eye with a special type of foil
Atropine penalization—Blurring the vision of the stronger eye with medicated eye drops or ointment
There are no known ways to prevent this health problem.
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