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Young children with strabismus normally suppress the visual field of one eye (or part of it), whereas adults who develop strabismus normally do not suppress and therefore suffer from double vision . This also means that adults (and older children) have a higher risk of post-operative diplopia after undergoing strabismus surgery than young children.
In the fields of optometry and ophthalmology, the Hirschberg test, also Hirschberg corneal reflex test, is a screening test that can be used to assess whether a person has strabismus (ocular misalignment). A photographic version of the Hirschberg test is used to quantify strabismus. [1]
The cover test should be considered prior to testing VA patients with strabismus, for occlusion during testing may dissociate an unstable ocular deviation. In the case of intermittent or latent deviations, for dissociative complications leading to misdiagnosis, it is also advised that binocular vision is tested prior, along with stereo testing. [1]
Although glasses and/or patching therapy, exercises, or prisms may reduce or help control the outward-turning eye in some children, surgery is often required. A common form of exotropia is known as "convergence insufficiency" that responds well to orthoptic vision therapy including exercises. This disorder is characterized by an inability of ...
Young children adopt a compensatory head position in order to compensate for the underacting superior oblique muscle, [2] or have a tendency to close one eye whilst reading. [3] The characteristic head tilt is usually away from the affected side to reduce eye strain and prevent double vision ( diplopia ).
Eye glasses with an included prism power is the optical method to reduce a fixation disparity. Different procedures have been proposed to determine the required amount of prism for the individual. Based on prism-FD curves (Fig. 3b), one can find the aligning prism sP 0 that nullifies the naturally prevailing fixation disparity sFD 0. This test ...
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