| automated differential leukocyte counter | An instrument using digital imaging or cytochemical techniques to differentiate leukocytes. (05 Mar 2000) |
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| arc perimeter | A perimeter consisting of a saemicircular frame at the centre of which the patient looks while a white object is moving along the arc, the exact point where it becomes visible or invisible being noted and recorded on a chart. (05 Mar 2000) |
| Goldmann perimeter | A projection perimeter that adds further precision by controlling the surrounding illumination. (05 Mar 2000) |
| perimeter | 1. <geometry> The outer boundary of a body or figure, or the sum of all the sides. 2. An instrument for determining the extent and shape of the field of vision. Origin: Gr.; around + measure: cf. F. Perimetre. Source: Websters Dictionary (01 Mar 1998) |
| projection perimeter | A perimeter that uses as target a spot of light that can be adjusted rapidly as to size, brightness, and colour, and moves silently at any desired speed. (05 Mar 2000) |
| Tubinger perimeter | A bowl perimeter in which a static stimulus was increased in intensity until detected. Origin: Tubingen, German city (05 Mar 2000) |