Since there may be no obvious signs to indicate a functional weakness of vision (amblyopia), all children should have an ophthalmic / orthoptic examination on the second year of life in addition to the usual screening examinations. Strabismus is not harmless or just a minor cosmetic defect- it not only causes unilateral visual impairment but also severe impairments of binocular vision. Only early ophthalmological / orthoptic intervention can prevent this happening.
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