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Amblyopia

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Amblyopia is a common visual disorder that caused by abnormal neural development in the childhood usually due to anisometropia, strabismus, cataract or combination of them. Amblyopia leads to many monocular and binocular problems with the affected eye such as impaired visual acuity, contrast sensitivity, motion perception, excessive crowding and impaired or absence of stereopsis. In critical period the visual acuity deficit linked with amblyopia can be treated monocularly by correcting the refractive error using glasses and then encourage use of the amblyopic eye either by occluding (patching) or punishment (with atropine cycloplegia) the non-amblyopic eye. They are effective method but residual monocular and binocular visual impairments may remain after patching and/or atropine therapy. Treatment of teenager and adult is something argumentatively. Study shows that conventional treatment can be effective in teenager and using techniques such as monocular perceptual learning may improve the visual function in adults with…show more content…
Binocular treatment is based on evidence that patients with amblyopia have the ability to combine information between two eyes if suppression is minimized by presenting stimuli at high contrast to the amblyopic eye and at low contrast to the fellow eye (contrast balancing). The amblyopic eye may be structurally intact, but functionally suppressed. Binocular treatments depend on tasks that require binocular combination of stimuli that are presented dichoptically with a contrast offset in favour of the amblyopic eye. As treatment progresses, the interocular contrast difference is gradually reduced to promote binocular fusion. The first binocular balance should be repeated because of psychophysical motion discrimination task taken under dichoptic presentation
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