[Studies on asthenopia. Influence of the space between the visual object and its background on the speed of vision and on visual fatique].
D000065:Accommodation, Ocular; D000328:Adult; D001248:Asthenopia / Q000209:etiology*; D005260:Female; D005403:Fixation, Ocular; D006801:Humans; D013997:Time Factors; D014787:Vision Tests; D014794:Visual Fields