Topic: Use a Keratometer
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Answers to Common Questions
What is a keratometer
A keratometer is an instrument for measuring the curvature of the c... ...MORE... Read More »
Source: http://www.chacha.com/question/what-is-a-keratometer
How do you read a keratometer?
First clean the chin rest and head rest with alcohol. Keep the occluder in up position. Second, turn the eyepiece counter clockwise as far as it can go then turn clockwise until the cross hair is crystal clear (ensuring not to turn the eyep... Read More »
Source: http://wiki.answers.com/Q/How_do_you_read_a_keratometer
What is ker·a·tom·e·ter?
( kĕr'ə-tŏm'ĭ-tər ) n. An instrument for measuring the curvature of the anterior surface of the cornea. Also called ophthalmometer. ker'a·tom'e·try adj. Read More »
Source: http://www.answers.com/topic/keratometer
More Common Questions
Answers to Other Common Questions
The reflected mire images used in conventional keratometry suffer from oblique astigmatism, resulting in separated sagittal and tangential image planes. Further complications arise if the cornea is assumed to be aspherical. To investigate t...
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Source: http://www.ncbi.nlm.nih.gov/pubmed/1766688
The Wikipedia article says that those are two names for the same instrument: "A keratometer, also known as a ophthalmometer, is a diagnostic instrument for measuring the curvature of the anterior surface of the cornea, particularly for asse...
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Source: http://answers.yahoo.com/question/index?qid=20110926051619AAIA596
The keratometer measures the difference of curvature between the vertical and horizontal meridians so permitting to correct the astigmatism. As curvature , dioptric power of the eye and radius are connected by well known formula , if you ha...
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Source: http://answers.yahoo.com/question/index?qid=20090416013845AAzld3T
A keratometer is a medical apparatus that eye-care professionals use to measure the reflection and curvature of the anterior surface of the cornea. One can also call the keratometer 'an ophthalmometer.' By virtue of the keratometer, an eye-...
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Source: http://www.blurtit.com/q511230.html
Optical instrument for measuring the radius of curvature of the cornea in any meridian. By measuring along the two principal meridians, corneal astigmatism can be deduced. The principle is based on the reflection by the anterior surface of ...
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Source: http://medical-dictionary.thefreedictionary.com/keratometer
A keratometer using a microprocessor computer to facilitate the rapid measurement of the corneal curvature. Such instruments usually provide measurements of the peripheral and central corneal curvatures at different points providing a conto...
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Source: http://medical-dictionary.thefreedictionary.com/auto+keratometer
You will get faulty or no measurement results if: the instrument is not properly focused on the eye measuring marks are partly obscured by eyelid or eyelashes the eye is being closed during the measurement strong reflections are additionall...
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Source: http://www.zeiss.com/C1256CAB00599F5D/ContentsWWWIntern/DFBD9FC57...
