What Is Lazy Eye?

Lazy eye generally refers to amblyopia (weak eye) and/or strabismus (cross eye). It can sometimes mean a convergence disorder like CI.

The amblyopic eye

Amblyopia

Amblyopia is when an eye has reduced vision that isn't primarily caused by a physical defect in the eye. It is a problem with how the brain perceives and interprets the information coming from the amblyopic eye. It often leads to a suppression of the information coming from the amblyopic eye. There are three major types of amblyopia: refractive, strabismic, and deprivational. Read more about amblyopia here.

Strabismus

Strabismus is a misalignment of one or both of the eyes. This misalignment can cause stereo blindness, suppression, amblyopia, and/or diplopia. There are several classifications of strabismus depending on how the eyes are misaligned. Read more about strabismus here.

How Many People Have Lazy Eye?

Based on 2010 census data, there were about 18 million people with strabismus and 9.2 million with amblyopia[2] in the united states. About 19.2 million have been diagnosed with lazy eye in the US alone. There are about 2.5 million children under age of 10 with lazy eye, and 250,000 more born every year in the United States.[2]

If you think that those are big numbers consider that, "A clinical trial to determine the prevalence of binocular vision dysfunction[1] in within the general population suggested the possibility of up to 56% or 60 million men, women, and young adults with symptoms associated with a binocular vision dysfunction."

What Causes Lazy Eye?

First, what is lazy eye? Lazy eye is a common term for a group of disorders called amblyopia and strabismus. Lazy eye causes may be due to an unequal glasses prescription (called refractive amblyopia), eye turn (strabismic amblyopia), or a combination of both (mixed amblyopia). If for some reason the eye does not get a clear image due to a malformed eyelid or dense childhood cataract, this can cause a more rare form called deprivation amblyopia.

How Many People Have Lazy Eye?

Based on 2010 census data, there were about 18 million people with strabismus and 9.2 million with amblyopia in the united states. About 19.2 million have been diagnosed with lazy eye in the US alone. There are about 2.5 million children under age of 10 with lazy eye, and 250,000 more born every year in the United States.

If you think that those are big numbers consider that, "A clinical trial to determine the prevalence of binocular vision dysfunction in within the general population suggested the possibility of up to 56% or 60 million men, women, and young adults with symptoms associated with a binocular vision dysfunction."[2]

References

  1. Neural plasticity in adults with amblyopia, Dennis M. Levi and Uri Polat
  2. The Binocular Vision Dysfunction Pandemic, Dominick M. Maino

Find a Vivid Vision Provider

Over 275 Vivid Vision Providers prescribe virtual reality alongside patching and vision therapy to treat your lazy eye. Sign up throught our doctor locator to see if Vivid Vision is right for you.