Neue Methode der Einschätzung des Sehwirkungsgrades Biomedizinische Tedhiik Biomcd. Technik 3 B ( 1093), 94-98 Information Throughput Characteristics a New Method for Evaluation of Visual Efficiency K. Penkala Charakteristiken des Informationsdurchsatzeseine neue Methode der Einschätzung des Sehwirkungsgrades Department of Cybernetics and Electronics, Institute of Electronics and Computer Science, Tech" nical University of Szczecin and 2nd Clinic of Ophthalmology, Pomeranian Medical Academy Key words: Visual efficiency - Information throughput - visual acuity - reaction time - ergophthalmology A method based on Information theory for computer-aided assessment of visual capacity has been elaborated. In this method, the rate of recognition of visual targets is considered along with the accuracy of perception. Measurements are performed in a wide ränge of optical Stimulus intensities (the Landolt ring size ranging from 0.125 to 1.57, in 10 logarithmic steps). For each step the Information throughput (IT) is calculated and the results are displayed äs a function of Stimulus intensity. Thus, the IT characteristics of the visual System, with regard to motor response, are obtained. Within the reported ränge, they reveal low-pass properties of the System. Preliminary experiments show that these curves are useful in the evaluation of visual performance, especially in ergophthalmology. A recently
Biomedizinische Technik / Biomedical Engineering – de Gruyter
Published: Jan 1, 1993
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