[Objective measurements of visual acuity by visual evoked potentials].
Electrophysiological measurements of the threshold spatial frequency were conducted in 26 healthy subjects by using visual evoked potentials with the purpose of objective determination of the visual acuity. For that we proposed a universal method of the visual stimulation and EEG processing (using ICA decomposition in particular) to minimize errors arising on account of individual differences in the visual system functioning. As a result, a correlation of 0.74 and a logarithmic dependence were obtained between spatial resolution measured by electrophysiological and psychophysical methods. The proposed methods of objective measurement of visual resolution has a high effectiveness, does not depend on specificity of individual EEG and domination of different channels in the visual system. Therefore it is possible to determinate objectively the visual acuity in humans independently of their responses.
Kharauzov
A K
AK
Pronin
S V
SV
Sobolev
A F
AF
Koskin
S A
SA
Boĭko
E V
EV
Shelepin
Iu E
IuE
D000293:Adolescent; D000328:Adult; D004569:Electroencephalography; D005074:Evoked Potentials, Visual; D006801:Humans; D014787:Vision Tests; D014792:Visual Acuity