title: Spontaneous fluctuations in pupil size are not triggered by lens accommodation.
abstract: Fluctuations in pupil size and lens accommodation are measured concurrently under open loop conditions, constant illumination and far fixation. In 12/17 trials no correlation was measured between the fluctuations in pupil size and lens accommodation. For the remaining 5/17 trials no lag was observed between the changes in pupil size and lens accommodation indicating that this correlation does not arise as a consequence of a near response. These observations suggest that under conditions of constant illumination and far fixation, the supranuclear centers controlling the near response are not active.
authors.affiliation: Department of Neurology, University of Chicago Hospitals, IL 60637, USA.
authors.forename: J D
authors.initials: JD
authors.lastname: Hunter
authors.forename: J G
authors.initials: JG
authors.lastname: Milton
authors.forename: H
authors.initials: H
authors.lastname: Lüdtke
authors.forename: B
authors.initials: B
authors.lastname: Wilhelm
authors.forename: H
authors.initials: H
authors.lastname: Wilhelm
mesh_terms: D000065:Accommodation, Ocular / Q000502:physiology*; D005403:Fixation, Ocular; D006801:Humans; D008029:Lighting; D011680:Pupil / Q000502:physiology*