Summary:
Computer perimetry is constantly being developed but still remains a subjective
examination method.The patient ´s cooperation plays an important part and
therefore examination strategies are improved to make it possible to obtain the
most accurate possible results during the shortest possible examination time.The
author presents an account on the comparability of results of rapid TOP strategy (Tendency Oriented Perimetry)and normal threshold strategy with programme
G2 on the perimeter OCTOPUS 101.
It involves the retrospective evaluation of 73 visual fields which were divided into
four groups according to the achieved retinal sensitivity during examination with
TOP strategy and with normal threshold strategy.The author compared the
obtained parameters MD and LV,she compared the sites of defects of retinal
sensitivity in both strategies and calculated the time saved by rapid TOP strategy.
High comparability was achieved in group 1 with normal retinal sensitivity in
both strategies and also in group 4 with abnormal retinal sensitivity in both
strategies.In groups 2 and 3 comparability was not proved (group 2 -abnormal
retinal sensitivity in TOP and normal retinal sensitivity in normal threshold
strategy,group 3 normal retinal sensitivity in TOP and abnormal retinal sensi
tivity in normal threshold strategy).In these groups we may assume a higher ratio
of the so-called learning effect or conversely fatigue and poorer cooperation of
the patients during the lengthy examination by normal threshold strategy.The
localization of defects agreed in group 4 in 83.3%and in the other groups it was
not compared (group 1 practically without defects,in groups 2 and 3 the results
were not comparable).The total time saved with TOPstrategy was 75.8%,the mean
examination time with TOP strategy was 3 minutes 27 seconds,with normal
threshold strategy 14 minutes 17 seconds.With regard to the significant time
saving the programme G2 with TOP strategy can be considered suitable for
patients with glaucoma,with intraocular hypertension and with suspected glau-
coma but it can be also used as a screening method with quantitative results for
other situations.
Key words:
computer perimetry,rapid TOP strategy,normal threshold strategy,
quantitative results,short examination time
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