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A statistical trap in the evaluation of visual field decay
Author(s) -
Krakau C. E. T.
Publication year - 1985
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.1755-3768.1985.tb06830.x
Subject(s) - visual field , trap (plumbing) , amplitude , field (mathematics) , glaucoma , noise (video) , signal (programming language) , sampling (signal processing) , optometry , computer science , physics , optics , medicine , artificial intelligence , mathematics , ophthalmology , meteorology , detector , pure mathematics , image (mathematics) , programming language
Computerized perimetry has made it possible to evaluate quantitatively the visual field decay in glaucoma and other cases. The performance fluctuates with considerable amplitude and therefore the heart of the matter concerns the detection of a signal in presence of noise. How insufficient number of observations and uncautious sampling may result in false conclusions as to the effect of therapy etc is described in the present paper.