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What Causes Amblyopia?
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Amblyopia is caused by any condition that affects normal use of the eyes and
visual development. Amblyopia has the following three major causes:
- Strabismus
- Unequal Focus; and
- Cloudiness in the eye tissues
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Strabismus (misaligned or "crossed eyes")
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Amblyopia occurs most commonly with misaligned eyes. The crossed eye "turns off" to
avoid double vision. The child uses only the better eye.
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Unequal Focus
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Refractive errors are eye conditions that are corrected by wearing glasses.
These include nearsightedness, farsightedness, and astigmatism. Amblyopia
occurs when an unfocused eye "turns off" and does not develop to its full
potential. The eyes can appear normal, but one eye has poor vision. This type
of amblyopia can be detected only by careful measurment of vision.
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Cloudiness in the Normally Clear Eye Tissues
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Any factor that prevents a clear image from being focused inside the eye can
lead to the development of amblyopia in a child. An eye disease such as a
cataract (clouding of the eye's natural lens) blocks vision and may cause
amblyopia.
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How is Amblyopia Treated?
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Dr. Deena Leonard
and
Dr. Dana Kolton
, pediatric ophthalmologists, routinely treat
amblyopia in children. Common treatments include the following:
- Patching
- Prescription Glasses; and
- Surgery
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Patching
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By covering the stronger eye, the weaker or "lazy eye" is forced to work.
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Prescription Glasses
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Glasses can correct refractive errors and help focus the eyes.
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Surgery
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Surgical correction of the eye muscles may be required to straighten eyes
which are misaligned. Congenital cataracts also require surgical correction.
Once amblyopia is detected, treatment should be initiated immediately.
Through early vision screening and appropriate treatment, children can enjoy a
lifetime of good vision.
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