plano-refraction
English translation: No -(0.00 degrees of)- refractive error
| 02:18 Jun 23, 2005 |
| English language (monolingual) [PRO] Medical - Medical: Instruments / Implantable contact lens | |||||||
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|  Selected response from: Elena Petelos United Kingdom Local time: 11:45 | ||||||
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| SUMMARY OF ALL EXPLANATIONS PROVIDED | ||||
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| 4 | No -(0.00 degrees of)- refractive error |
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Answers
46 mins confidence: 
No -(0.00 degrees of)- refractive error Explanation: Refractive error, or the degree from which you do not have normal vision, is commonly measured in diopters. A diopter is often represented by a capital "D" in a prescription. No refractive error is referred to as "plano", often represented as "pl". http://www.usaeyes.org/faq/subjects/script.htm In patients with myopia, correction was attempted aiming for plano or reduction of the myopic refractive error to the maximum extent. By saying the result usually is over-correction, we mean there is a shift from - over plano - to + For example high myopic refractive error is -8D, (for plano 0), but with slight over-correction (+1,2,3, etc D) in this case (+0.50 to +2.75 D), plano 0.00 D http://www.vision.io.csic.es/papers_pdfs/OVS_chicken.pdf The “amplitude of accommodation” of an eye is the maximum amount that the eye’s crystalline lens can accommodate (change shape), in diopters (D). This amount is very high when young and decreases with age. The amplitude of accommodation is equivalent to the inverse (reciprocal) of the distance (“nearpoint of accommodation”) at which the emmetropic eye can focus clearly. (“Emmetropia” refers to an eye having no refractive error—not hyperopia, myopia, or astigmatism—or it can refer to the optical system of an eye corrected to “plano” (0.00 diopters of refractive error) with glasses or contact lenses.) Reference: http://www.tedmontgomery.com/the_eye/lens.html |
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