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Prism correction. Prism lenses (here unusually thick) are used for pre-operative prism adaptation. Eye care professionals use prism correction as a component of some eyeglass prescriptions. A lens which includes some amount of prism correction will displace the viewed image horizontally, vertically, or a combination of both directions.
The Maddox Wing test is performed at near with the instrument held in reading position, slightly inferior (approximately 15° depression and 33 cm away). The room or location of the test should be brightly illuminated and the patient's optical correction (e.g. glasses, bifocals, multifocals, contact lens) is required to be worn.
A corrective lens is a transmissive optical device that is worn on the eye to improve visual perception. The most common use is to treat refractive errors: myopia, hypermetropia, astigmatism, and presbyopia. Glasses or "spectacles" are worn on the face a short distance in front of the eye.
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Prescribe any glasses required and allow the patient time to 'settle into' them. Use occlusion to treat any amblyopia present and encourage alternation. Where appropriate, orthoptic exercises (sometimes referred to as Vision Therapy) can be used to attempt to restore binocularity.
Although HD Vision glasses do protect eyes from damaging ultra violet rays, they do not block the sun on bright days as well as dark-lens sunglasses. And they do not cut water glare as well...
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