title: The pupil--importance in the optics of the visual system. 1. Clinical data.
mesh_terms: D000221:Adaptation, Ocular; D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002986:Clinical Trials as Topic; D003261:Contact Lenses; D003623:Dark Adaptation; D005260:Female; D006801:Humans; D008027:Light; D008297:Male; D008875:Middle Aged; D055095:Optics and Photonics; D011680:Pupil / Q000033:anatomy & histology* / Q000502:physiology; D013223:Statistics as Topic; D014785:Vision, Ocular