title: VARIABILITY IN VISUAL THRESHOLDS.
mesh_terms: D006801:Humans; D008598:Menstruation; D010827:Physiology; D011603:Psychophysiology; D014787:Vision Tests; D014785:Vision, Ocular; D014796:Visual Perception
keywords: MENSTRUATION; PHYSIOLOGY; PSYCHOPHYSIOLOGY; VISION; VISION TESTS; VISUAL PERCEPTION