Lazy
eye is a common non-medical term used to describe
amblyopia because the eye with poorer vision
doesn't seem to be doing its job of seeing.
Amblyopia is the most common cause of impaired
vision in children, affecting nearly three out
of every 100 people or 2-4% of the population.
Vision is a combination of the clarity of the
images of the eyes (visual acuity) and the processing
of those images by the brain. If the images
produced by the two eyes are substantially different,
the brain may not be able to fuse the images.
Instead of seeing two different images or double
vision (diplopia), the brain suppresses the
blurrier image. This suppression can lead to
amblyopia. During the first few years of life,
preferring one eye over the other may lead to
poor visual development in the blurrier eye.
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