Manifest
English translation: subjective refraction test
| 10:50 Oct 15, 2005 |
| English language (monolingual) [PRO] Medical - Medical: Instruments | |||||||
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|  Selected response from: Dr Sue Levy (X) Local time: 19:55 | ||||||
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| SUMMARY OF ALL EXPLANATIONS PROVIDED | ||||
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| 4 +1 | subjective refraction test |
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| 3 | manifest refraction cylinder |
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| Discussion entries: 4 | |
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Answers
26 mins confidence: 
| manifest manifest refraction cylinder Explanation: is the expression you are actually looking at (for); it has a conventional abbreviation as "MRCYL", but apart from the dictionary definition, as "clearly seen, obvious", I cannot help you any further with "manifest" on its own. Which it probably means here anyway... |
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4 hrs confidence: peer agreement (net): +1
peer agreement (net): +1| manifest refraction subjective refraction test Explanation: Manifest refraction is a procedure used by ophthalmologists. I don't think it's going to help to have a synonym for manifest - you need to find out what a Chinese eye doctor calls the procedure! http://www.banjoben.com/introduction_to_refraction.htm Refraction The refraction consists of two parts: the objective and the subjective: The objective determination of the refractive error is done with a retinoscope and requires no subjective responses from the patient. As you might guess, the subjective part of the refraction requires subjective responses on the part of the patient. Subjective refraction (the manifest): Here is a cookbook method to get you started on the subjective. Hold your nose and take the plunge! After retinoscopy, you presumably have the patient fogged - over-corrected in plus power, in this case by 1.50diopters. This means that they see a very blurred chart. You also may have some cylinder in place. The basic steps in performing the subjective properly are always as follows: 1. find the best sphere before astigmatic testing 2. astigmatic testing 3. final best sphere after astigmatic testing etc.... -------------------------------------------------- Note added at 4 hrs 5 mins (2005-10-15 14:56:09 GMT) -------------------------------------------------- Manifest refraction A manifest refraction is the procedure whereby an individual's refractive error is determined, thus indicating the potential need for correction with glasses or contact lenses. The patient is asked to look through a phoropter while the examiner evaluates each eye with retinoscopy. The retinal reflex, similar to a cat's eye reflex at night, is utilized to help determine the refractive error while the patient fixates on a distant target. Refinement of the manifest refraction is subjective, that is, the patient makes choices between image quality with different lenses in place. Once the manifest refraction is complete, the ophthalmologist may write a prescription for glasses, fit contact lenses, or for patients considering refractive surgery, use the information to discuss surgical options. |
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