[Computer perimetry--rapid TOP (tendency oriented perimetry) and normal threshold methods in clinical practice--comparison of results].
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 sensitivity 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 TOP strategy 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 glaucoma but it can be also used as a screening method with quantitative results for other situations.
Kratochvilová
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D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D005901:Glaucoma / Q000175:diagnosis; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D058609:Visual Field Tests / Q000379:methods*; D014794:Visual Fields