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Prentice's rule is a formula to calculate the amount of prism correction in a lens based on decentration and lens power. It can be used for prescribing, tolerance control, or determining unprescribed prism in eyeglasses.
Strabismus is a vision disorder in which the eyes do not align properly when looking at an object. It can cause double vision, eye strain, and psychosocial difficulties. Learn about the symptoms, diagnosis, and treatment of strabismus.
A corrective lens is a device that improves visual perception by correcting refractive errors. Learn about the different types of corrective lenses, such as glasses, contact lenses, intraocular lenses, and their prescriptions, uses, and advantages.
Learn about the different types of optical prisms, such as dispersive, reflective, beam-splitting and polarizing prisms, and how they refract, reflect or split light. Find out how prisms are made of transparent materials like glass, acrylic or fluorite, and how they can create spectra, images or polarizations.
Diplopia is the simultaneous perception of two images of a single object, which may be voluntary or involuntary. It can result from various ophthalmologic, neurological, or systemic disorders, and can be classified as monocular or binocular, acute or chronic, and suppressed or not.
Homonymous hemianopsia is a visual field loss on the same side of both eyes, caused by brain injury or damage. Learn about its signs, symptoms, causes, diagnosis, and management, as well as related terms and references.
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