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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.
Learn how to interpret and write an eyeglass prescription that includes sphere, cylinder and axis components. Sphere and cylinder specify the power of the lenses, and axis defines the orientation of the cylinder relative to horizontal and vertical.
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.
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 origins and development of optics from ancient times to modern days. Explore the contributions of Greek, Roman, Islamic, and European scholars to the fields of geometrical, physical, and physiological optics.
Learn about optical coatings, thin layers of material that alter the way light reflects and transmits from optical components. Find out how metal coatings such as gold, silver and aluminium are used, and how they compare with dielectric coatings.
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related to: prism for eyeglassesFirst great made-on-the-internet brand. - Fast Company