perimeter

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A circular perimeter chart for the right eye shows the normal visual field outlined in red, with degrees of arc labeled around the outer edge for measuring visual range.

perimeter

eye testing

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human eye
The visual field
…field is measured on a perimeter, a device for ascertaining the point on a given meridian where a white spot just appears or disappears from vision when moved along this meridian. (A meridian is a curve on the surface of a sphere that is formed by the intersection of the…
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…field is measured on a perimeter, a device for ascertaining the point on a given meridian where a white spot just appears or disappears from vision when moved along this meridian. (A meridian is a curve on the surface of a sphere that is formed by the intersection of the…
Read More