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

Accommodation dynamics in divergence excess exotropia.

C M Schnider, K J Ciuffreda, J Cooper

    Investigative Ophthalmology & Visual Science
    |April 1, 1984
    PubMed
    Summary

    Objective recording revealed that patients with true divergence excess exotropia exhibit slowed accommodation dynamics, specifically increased latency and decreased overshoot. These findings suggest central mechanisms are involved in this visual condition.

    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

    Community based physiotherapy services in the Kivalliq Region of Nunavut, Canada.

    International journal of circumpolar health·2005
    Same author

    Development of a community-based medical rehabilitation programme in the Kivalliq Region of Nunavut, Canada.

    International journal of circumpolar health·2005
    Same author

    Speech language pathology services in Kivalliq Region of Nunavut, Canada.

    International journal of circumpolar health·2005
    Same author

    Short term prognosis of patients with acute coronary syndromes: the level of cardiac troponin T elevation corresponding to the "old" WHO definition of myocardial infarction.

    Heart (British Cardiac Society)·2005
    Same author

    Three-dimensional optical trapping of partially silvered silica microparticles.

    Optics letters·2004
    Same author

    A combination of two common thrombomodulin gene variants (-1208-1209TTdelTT and A455V) influence risk of coronary heart disease: a prospective study in men.

    Atherosclerosis·2004

    Area of Science:

    • Ophthalmology
    • Neuroscience
    • Vision Science

    Background:

    • Divergence excess exotropia is a common strabismus characterized by outward deviation of the eyes.
    • Understanding the dynamics of accommodation (focusing) is crucial for diagnosing and managing strabismus.
    • Previous research has not fully elucidated the accommodative response in true divergence excess exotropia.

    Purpose of the Study:

    • To objectively record and analyze accommodation dynamics in patients with divergence excess exotropia.
    • To compare accommodation dynamics between true exotropia, simulated exotropia, and normal controls.
    • To investigate the underlying mechanisms of observed accommodative changes.

    Main Methods:

    • Objective recording of accommodation dynamics using specialized equipment.

    Related Experiment Videos

  • Inclusion of four patients with divergence excess exotropia (two true, two simulated) and three healthy controls.
  • Analysis of accommodative peak velocity/amplitude, latency, and overshoot frequency.

    • Main Results:

    • The accommodative peak velocity/amplitude relationship was normal in all exotropic patients and controls.
    • Significantly increased latency for decreasing accommodation was observed in true divergence excess exotropia.
    • Decreased overshoot frequency was noted in true divergence excess exotropia patients.

    Conclusions:

    • Accommodation dynamics are subtly altered in true divergence excess exotropia, characterized by slowed responses.
    • Increased latency and reduced overshoot suggest central rather than peripheral mechanisms are responsible.
    • These findings contribute to a better understanding of the neurophysiological basis of divergence excess exotropia.