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The most common application for this is the treatment of strabismus. By moving the image in front of the deviated eye, double vision can be avoided and comfortable binocular vision can be achieved. Other applications include yoked prism where the image is shifted an equal amount in each eye.
Vision therapy is a subset of behavioral optometry. In general, vision therapists attempt to improve the vision, and therefore day-to-day well-being, of patients using "eye exercises," prism, and lenses, with more emphasis on the patient's visual function.
The prism cover test (PCT) is an objective measurement and the gold standard in measuring strabismus, i.e. ocular misalignment, or a deviation of the eye. It is used by ophthalmologists and orthoptists in order to measure the vertical and horizontal deviation and includes both manifest and latent components. [1]
Prisms or "field expanders" that bend light have been prescribed for decades in patients with hemianopsia. Higher power Fresnel ("stick-on") prisms are commonly employed because they are thin and lightweight, and can be cut and placed in different positions on a spectacle lens.
Whether crying is beneficial depends on several factors, says Vingerhoets. These include a person's underlying psychological state, the reason they are crying and how others respond. Not crying is ...
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Prism adaptation has been introduced as a form of rehabilitation therapy for patients with unilateral neglect. The main issue faced by unilateral neglect patients is that their frame of visual attention is not only pathologically smaller but also biased towards the right visual hemifield.
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In contrast, spectacles with prisms of equal power for both eyes, called yoked prisms (also: conjugate prisms, ambient lenses or performance glasses) shift the visual field of both eyes to the same extent.
(Reuters) -The U.S. FDA's panel of independent advisers will on June 4 deliberate whether they should recommend approval for the first MDMA-assisted therapy for post-traumatic stress disorder ...
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