Know about Strabismic Amblyopia

Amblyopia can be caused by strabismus (malalignment of eyes), anisometropia (different degrees of myopia or hypermetropia in two eyes and result in refractive/anisometropic amblyopia), and astigmatism or by disorders of eye which obstruct vision such as congenital cataract.

Strabismic amblyopia:

This is caused by strabismus (sometimes called lazy eye incorrectly), where there is misalignment or malalignment of the two eyes of same person. Strabismus may usually causes normal vision in the eye (the eye that the person suffering from strabismus prefers to use), which is preferably used by the individual, but may cause abnormal vision in the other eye due to the difference between the images created in the brain from the two eyes. Strabismus if it starts in adult age (late onset strabismus) leads to development of diplopia or double vision, as the two eyes generally can not fix on the same object due to misalignment or malalignment of the two eyes.

Strabismus developing during childhood usually does not cause double vision, because the brain of children is generally more neuroplastic and can easily adapt and can suppress images from one of the eyes. But this adaptive nature of children’s brain can interrupt normal brain development and lead to development of amblyopia.

Treatment of strabismic amblyopia:

The treatment of strabismic amblyopia consist of making the visual images clear by use of glasses and/or by encouraging to use the amblyopic eye more by applying eye patch over the normal eye (which is usually dominant and the person use it more, normally). Another method of treatment of strabismic amblyopia is called “pharmacologic penalization”, by application of atropine drops to the normal/dominant eye, which case blurring of vision in the normal eye due to dilatation of pupil of the normal eye. Use of atropine drops may prevent teasing/bullying associated with use/wearing of eye patch, by friends, but have side effects of atropine. If there is misalignment or malalignment of the two eyes, it can be sometimes treated with surgical intervention.

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