title: Weak gender effects on transient pupillary light reflex.
abstract: We investigated the gender effects on transient pupillary light reflex (PLR) in healthy young adults between 18 and 22 years old. Both dark-adapted and light-adapted PLRs were measured using green and red stimuli of different intensities. The results indicate that females had significantly larger relative constriction amplitudes than males in a dark-adapted condition. This gender effect depends on the stimulus intensities. The relative constriction amplitude in female subjects increased faster than it did in the males with the stimulus intensity. We did not observe any significant gender differences in the other PLR parameters, including latency, constriction speed, and recovery speed.
authors.affiliation: Department of Biological Engineering, University of Missouri-Columbia, Columbia, MO 65211, USA.
authors.forename: Xiaofei
authors.initials: X
authors.lastname: Fan
authors.forename: Leonard
authors.initials: L
authors.lastname: Hearne
authors.forename: Bo
authors.initials: B
authors.lastname: Lei
authors.forename: Judith H
authors.initials: JH
authors.lastname: Miles
authors.forename: Nicole
authors.initials: N
authors.lastname: Takahashi
authors.forename: Gang
authors.initials: G
authors.lastname: Yao
mesh_terms: D000221:Adaptation, Ocular / Q000235:genetics; D000293:Adolescent; D000367:Age Factors; D000375:Aging / Q000502:physiology; D003623:Dark Adaptation / Q000235:genetics; D005260:Female; D006801:Humans; D007498:Iris / Q000502:physiology*; D008297:Male; D008636:Mesencephalon / Q000502:physiology; D009119:Muscle Contraction / Q000502:physiology; D009130:Muscle, Smooth / Q000502:physiology; D010275:Parasympathetic Nervous System / Q000502:physiology; D010775:Photic Stimulation; D011930:Reaction Time / Q000235:genetics; D012025:Reflex, Pupillary / Q000235:genetics*; D012727:Sex Characteristics; D055815:Young Adult