The pain in eyestrain.
D000293:Adolescent; D000328:Adult; D001248:Asthenopia / Q000209:etiology*; D002648:Child; D005221:Fatigue / Q000209:etiology; D006801:Humans; D008875:Middle Aged; D010146:Pain / Q000209:etiology*; D010830:Physostigmine / Q000494:pharmacology*; D012601:Scopolamine / Q000494:pharmacology*
D010830:Physostigmine; D012601:Scopolamine