[Increment threshold in the case of a defocused image (a disk)].
D005556:Form Perception; D006801:Humans; D010775:Photic Stimulation; D014787:Vision Tests / Q000295:instrumentation / Q000379:methods; D014792:Visual Acuity
Raznostnyĭ porog pri defokusirovannom izobrazhenii (diska)