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AN AUTOMATIC STATIC PERIMETER, DESIGN AND PILOT STUDY
Author(s) -
HEIJL A.,
KRAKAU C. E. T.
Publication year - 1975
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.1975.tb01161.x
Subject(s) - perimeter , computer science , mathematics , geometry
An instrument for automatic static perimetry at 14 points across a meridian was constructed and used in a pilot study. The machine was controlled by a computer and the subjects responded to the light stimuli by pressing one of two push‐buttons. Most people investigated readily understood the rules at testing. “Blunders” made by the subject were, however, so common, that allowance had to be made in the test programme for a number of mistakes. The test stimuli should be exposed in random order. When the zone of uncertain seeing is wide — this occurs especially in untrained subjects — a simple test logic gives a fairly large variation. An improvement in reproducibility is then obtained by applying a more complicated logic, though at the cost of an increased duration of the test session.