Volume 34 #3

Contents

1. Variability of the pattern VEP parameters in children without visual impairment and questions of preclinical diagnostics
2. Three tactics for gene therapy of two congenital retinal diseases. Review
3. Discrimination of rippled spectra with different ripple densities
4. Method of iterative tomography reconstruction of cropped sinograms
5. ANALYSIS OF A STOPPING METHOD FOR TEXT RECOGNITION IN VIDEO STREAM USING AN EXTENDED RESULT MODEL WITH PER-CHARACTER ALTERNATIVES
6. Recognition of projectively transformed planar figures. XIV. New methods for projectively-invariant description of ovals, using an H-polar curve and dual points
7. Radial distortion correction for camera submerged under water

Amplitude and latency of binocular VEPs to pattern reversed stimuli with check sizes 240, 96, 48, 24 and 12 min were investigated in 35 emmetropic 7–14 age children with visual acuity 1.0 and more. Different types of dependence of VEPs components from check size were revealed by cluster analysis. Statistically significant latency and peak to peak amplitude of N75-P100 increase were observed as the check size decreased. In two cluster groups that had no difference in sex and age this increase was in different level. In the group with a large latency N75 and P100 for all stimulus sizes, the visual acuity was significantly higher. Factor analysis of latency N75 and P100 showed that these components have different origins at low, medium, and high spatial frequencies. We consider the possibility of using various components of the VEP and their dynamics when changing the spatial frequency of the stimulus as preclinical markers for evaluating the effectiveness of the visual system.

Key words: electrophysiological diagnostics, visual evoked potentials, preclinical diagnostics, norm

DOI: 10.31857/S023500922003004X

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