What is amblyopia?
When the eye is irritated, the lacrimal gland produces a large volume of tears which overwhelms the tear drainage system. These excess tears then overflow from your eye.
Amblyopia develops when any of the following conditions occur:
Children under 9 years of age whose vision is still developing are at the highest risk of amblyopia. Generally, the younger the child is, greater is the risk.
Amblyopia develops because when one eye is turned, as in squint, two different pictures are sent to the brain. In a young child, the brain learns to ignore the image of the squinting eye and see only the image of the better eye. Similarly when there is difference in power between the two eyes, the blurred image formed by the eye with greater power is avoided by the brain. In order that the retina may capture an object, it needs adequate light and visual stimulus. When these factors are absent, as in the presence of cataract, amblyopia results. A moderate or high degree of refractive power present in both eyes, when not corrected early and adequately, also results in amblyopia.
Amblyopia can often be reversed if it is detected and treated early. Cooperation of the patient and parents is required to achieve good results. If left untreated or if not treated properly, the reduced vision or amblyopia becomes permanent and vision cannot be improved by any means.
The most effective way of treating amblyopia is to make the child use the amblyopic eye. Covering or patching the good eye to force the use of the amblyopic eye may be necessary to ensure equal and normal vision. This can be achieved by:
Occlusion refers to closure of the normal eye with a patch, thus forcing the child to use the amblyopic eye. Occlusion is done from a few hours to a few days, depending upon the age of patient and the type and severity of amblyopia. In cases experiencing less severe amblyopia, partial occlusion, such as that by making one glass translucent, may be sufficient. Older children can do reading exercises at home while patching the normal eye. Those patients who are patching their eyes need periodic follow-up, which is scheduled with an ophthalmologist. Duration of treatment may extend from months to years. The ophthalmologist will decide for how long the occlusion should be continued. Loss of vision from amblyopia is preventable if treatment is begun early.
Facts on Patching.
Method of patching should be according to the interests of the child