photokeratoscopy

Determination of corneal curvatures and topography by photographing the corneal image of a target (usually black and white concentric rings) provided with the instrument. Measuring the size of the image and knowing the size of the object, it is possible to calculate the topography of the cornea. The theory is the same as that of the keratometer. A permanent photographic record is given with this method. The area of the cornea that is evaluated is much larger than with a keratometer. See corneal topography; keratoscope; stereophotography; videokeratoscope.

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The best videokeratography for each eye was selected based on the regularity of the photokeratoscopy mires and quality of the color-coded map.

Mapas de elevacion posterior y <> para evaluar el queratocono y guiar el implante de <>: un paso hacia el mejoramiento del nomograma de <>

schools such as refractions, photokeratoscopy, and ultrasonography to determine rates of myopia, astigmatism, and hyperopia.

Is school vision screening effective?

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