Friedmann visual field analyser

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analyser, Friedmann visual field 

Instrument designed to examine the central visual field. It utilizes a single xenon discharge tube placed within an integrating bowl, in front of which are fenestrated plates which can present 15 different patterns composed of either two, three or four stimuli of variable intensity and brief duration. Mark II has two programmes with 18 and 31 patterns each. See automated perimeter.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann
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