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Eyeglass prescription print that page


An eyeglass prescription is an order written by an eyewear prescriber, such as an optometrist or ophthalmologist , that specifies the value of all parameters the prescriber has deemed necessary to construct and/or dispense corrective lenses appropriate for a patient. If an examination

Corrective lens print that page


divergent lens, whereas hyperopia (far-sightedness) requires convergent lens. Contents 1 Prescription of corrective lenses 1.1 Components of a sphero-cylindrical correction 1.1.1 Sphere component 1.1.2 Cylinder component 1.1.3 Axis component 1.1.4 Sphero-cylindrical correction

Bausch & Lomb print that page


but ambitious workshop producing monocles . In 1861, the company manufactured Vulcanite rubber eyeglass frames and other precision vision products. [ 2 ] [ edit ] Early growth of the company During the American Civil War , the blockade caused the price of gold and European horn to rise

Phoropter print that page


eye during sight testing, to measure an individual's refractive error and determine his or her eyeglass prescription . [ 1 ] The word "phoropter" and the shape and configuration of the instrument are registered trademarks of Reichert, Inc. of Buffalo, NY USA (formerly American Optical

Hyperopia print that page

hyperopia. At the conclusion of an eye examination , an eye doctor may provide the patient with an eyeglass prescription for corrective lenses . Minor amounts of hyperopia are sometimes left uncorrected. However, larger amounts may be corrected with convex lenses in eyeglasses or contact

wikipedia.org | 2011/4/21 7:22:21

Glasses print that page


Historical types of glasses include the pince-nez , monocle , lorgnette , and scissor or scissors-glasses . Modern glasses are typically supported by pads on the bridge of the nose and by temple arms (sides) placed over the ears . CR-39 lenses are the most common plastic lenses due to their

Optician print that page


some opticians may work in a joint practice with other eye care professionals. Opticians convert a prescription for the correction of a refractive error into an ophthalmic lens or some other device, such as reading aids or telescopic lenses. [ 6 ] [ 7 ] [ 8 ] An optician will consult with

Visual acuity print that page

3 vision would be twice normal acuity. [ 2 ] The 20/ x number does not directly relate to the eyeglass prescription required to correct vision, because it does not specify the nature of the problem corrected by the lens, only the resulting performance. Instead an eye exam seeks to find

wikipedia.org | 2011/7/27 0:49:44

Myopia print that page


to let more light in, which adds aberrations, resulting in becoming more nearsighted. A stronger prescription for myopic night drivers is often needed. Younger people are more likely to be affected by night myopia than the elderly. [ 10 ] [ 11 ] Pseudomyopia is the blurring of distance vision

Aspheric lens print that page


viewer's eyes less as seen by other people, producing better aesthetic appearance. [ 1 ] Aspheric eyeglass lenses typically do not provide better vision than standard "best form" lenses, but rather allow a thinner, flatter lens to be made without compromising the optical performance. [ 1