Jove
Visualize
Contact Us
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

Related Experiment Videos

Nonius horopter in projected viewing.

R W Reading, M K Smolek

    American Journal of Optometry and Physiological Optics
    |January 1, 1986
    PubMed
    Summary
    This summary is machine-generated.

    Nonius horopter measurements reveal that projected viewing can introduce irregularities due to fixation disparity. Averaging measurements smooths these variations, suggesting vergence eye movements influence horopter locus.

    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

    Contribution of the ocular surface to visual optics.

    Experimental eye research·2004
    Same author

    Screening of prior refractive surgery by a wavelet-based neural network.

    Journal of cataract and refractive surgery·2001
    Same author

    Is keratoconus a true ectasia? An evaluation of corneal surface area.

    Archives of ophthalmology (Chicago, Ill. : 1960)·2000
    Same author

    Anomalous acute inflammatory response in rabbit corneal stroma.

    Investigative ophthalmology & visual science·2000
    Same author

    Keratoconus detection with the KISA% method-another view.

    Journal of cataract and refractive surgery·2000
    Same author

    Corneal hydration and central islands after excimer laser photorefractive keratectomy.

    Journal of cataract and refractive surgery·1998

    Area of Science:

    • Ophthalmology
    • Vision Science
    • Neuroscience

    Background:

    • The horopter is a theoretical concept in binocular vision.
    • Understanding the horopter is crucial for diagnosing and managing binocular vision disorders.

    Purpose of the Study:

    • To investigate horopter measurements using different viewing conditions.
    • To explore the impact of ocular anomalies on horopter measurements.
    • To identify factors contributing to irregularities in horopter measurements.

    Main Methods:

    • Nonius horopter measurements were conducted on normal subjects and subjects with ocular anomalies.
    • Both physically displaced (real viewing) and stereogrammetrically displaced (projected viewing) test objects were used.
    • Eye position and fixation disparity were monitored during measurements.

    Related Experiment Videos

    Main Results:

    • Projected viewing revealed irregularities in the horopter locus for subjects with ocular anomalies.
    • Individual horopter plots showed day-to-day variations in irregularities.
    • Averaging multiple measurements smoothed the horopter locus, reducing apparent irregularities.
    • Irregularities were strongly correlated with changes in fixation disparity (vergence eye movements).

    Conclusions:

    • Fixation disparity, driven by vergence eye movements, is a significant factor causing irregularities in projected viewing horopter measurements.
    • While individual measurements can be irregular, averaging provides a smoother, more stable representation of the horopter locus.
    • These findings have implications for understanding binocular vision and diagnosing visual anomalies.