[Automated kinetic perimetry using different stimulus velocities].
BACKGROUND
Because kinetic perimetry is performed manually, it is difficult to standardize. This study evaluated the effect of different velocities of various stimuli on the results of automated kinetic perimetry.


METHODS
Twelve ophthalmologically healthy subjects were tested with stimuli III4, I4, I2, I1 using the Twinfield perimeter at velocities of 1-7 degrees/s.


RESULTS
Results of stimuli III4 and I4 were not dependent on velocity. Concerning stimuli I2 and especially I1 the isopters were narrower for increasing velocity, and variance in results was greater above 4 degrees/s.


CONCLUSIONS
The recommended velocity of 2 degrees/s is often exceeded in daily clinical practice, which explains part of the variation in findings between studies. Automated kinetic perimetry could ensure a constant, slower velocity and thus improve standardization.
Wabbels
B
B
Universitäts-Augenklinik, Im Neuenheimer Feld 400, 69120 Heidelberg. bettina_wabbels@med.uni-heidelberg.de
Kolling
G
G
D006801:Humans; D007700:Kinetics; D012016:Reference Values; D013997:Time Factors; D058609:Visual Field Tests / Q000295:instrumentation / Q000379:methods* / Q000592:standards