Jove
Visualize
Contact Us

Related Experiment Videos

Spatial pattern as a stimulus to the pupillary system.

K Ukai

    Journal of the Optical Society of America. A, Optics and Image Science
    |July 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

    Related Concept Videos

    You might also read

    Related Articles

    Articles linked to this work by shared authors, journal, and citation graph.

    Sort by
    Same author

    Bilateral coronary ostial stenosis caused by syphilitic aortitis in young adult.

    QJM : monthly journal of the Association of Physicians·2024
    Same author

    Purification and Characterization of Cystine Lyase a from Broccoli Inflorescence.

    Bioscience, biotechnology, and biochemistry·2016
    Same author

    Effect of Lipopolysaccharide of Haemophilus influenzae on Ciliary Activity of the Human Nasal Mucosa and Bullfrog Palate Clearance.

    Acta oto-laryngologica·2011
    Same author

    Effects of sibutramine on the central dopaminergic system in rodents.

    Neurotoxicity research·2004
    Same author

    A case of clinically and neuropathologically atypical corticobasal degeneration with widespread iron deposition.

    Acta neuropathologica·2002
    Same author

    Late phase responses after nasal challenges with allergen and histamine in asthmatic children with perennial nasal allergy.

    Auris, nasus, larynx·2001
    Same journal

    Phase retrieval with prior information.

    Journal of the Optical Society of America. A, Optics and image science·2008
    Same journal

    Clinical microscopy of the cornea utilizing optical sectioning and a high-numerical-aperture objective.

    Journal of the Optical Society of America. A, Optics and image science·1993
    Same journal

    Eye-tracking laser Doppler velocimeter stabilized in two dimensions: principle, design, and construction.

    Journal of the Optical Society of America. A, Optics and image science·1993
    Same journal

    Effects of aging in retinal image quality.

    Journal of the Optical Society of America. A, Optics and image science·1993
    Same journal

    Axial eye-length measurement by wavelength-shift interferometry.

    Journal of the Optical Society of America. A, Optics and image science·1993
    Same journal

    Fractal analysis of steady-state-flicker visual evoked potentials: feasibility.

    Journal of the Optical Society of America. A, Optics and image science·1993
    See all related articles
    JoVE
    x logofacebook logolinkedin logoyoutube logo
    ABOUT JoVE
    OverviewLeadershipBlogJoVE Help Center
    AUTHORS
    Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
    LIBRARIANS
    TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
    RESEARCH
    JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
    EDUCATION
    JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
    Terms & Conditions of Use
    Privacy Policy
    Policies

    The pupil reflex responds to contrast reversal, likely due to luminance changes. Pupil size also varies with checkerboard check size, possibly linked to accommodation.

    Area of Science:

    • Ophthalmology
    • Visual Neuroscience
    • Physiological Optics

    Background:

    • The pupillary light reflex is a fundamental visual response.
    • Understanding pupillary dynamics aids in diagnosing visual system disorders.
    • Spatial factors influencing pupillary responses require further investigation.

    Purpose of the Study:

    • To investigate pupillary responses to contrast reversal of checkerboard patterns.
    • To explore the relationship between pupil size and visual stimulus characteristics like check size.
    • To determine if pupillary changes are linked to luminance shifts or accommodative variations.

    Main Methods:

    • Measuring pupillary responses to contrast-reversed checkerboard stimuli.
    • Varying check size and contrast of the visual stimuli.

    Related Experiment Videos

  • Analyzing pupillary size changes in relation to stimulus parameters.

    • Main Results:

    • The pupillary system demonstrated a clear response to contrast reversal.
    • This response is attributed to the light reflex triggered by local luminance changes.
    • Pupil size systematically altered with changes in checkerboard check size, independent of contrast reversal.

    Conclusions:

    • The pupillary system is sensitive to luminance fluctuations caused by contrast reversal.
    • Pupil size is influenced by the spatial characteristics of visual stimuli, such as check size.
    • The observed changes in pupil size may be related to variations in accommodative performance.