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

The IVEX refraction system: a clinical comparison.

J R Roggenkamp, N L Richardson, J B Krebsbach

    Journal of the American Optometric Association
    |July 1, 1985
    PubMed
    Summary

    A new IVEX Refraction System closely matches traditional refractors for subjective refractions in young adults. However, a slight tendency towards instrument myopia was observed in most participants.

    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

    Conflicts of interest.

    Optometry (St. Louis, Mo.)·2002
    Same author

    Evaluating provider prescribing practices for the treatment of tuberculosis in Virginia, 1995 to 1998: an assessment of educational need.

    The Journal of continuing education in the health professions·2001
    Same author

    Use of teleoptometry to evaluate acceptability of rigid gas-permeable contact lens fits.

    Optometry (St. Louis, Mo.)·2001
    Same author

    Concepts of traditional Oriental medicine.

    Optometry (St. Louis, Mo.)·2000
    Same author

    Implications of problem-based education for the future of optometric practice.

    Optometry (St. Louis, Mo.)·2000
    Same author

    Pacific's experience with Web-based instruction: bats in the belfry or Webs in the classroom?

    Optometry (St. Louis, Mo.)·2000

    Area of Science:

    • Ophthalmology
    • Optometry
    • Optical Engineering

    Background:

    • Traditional refraction methods are the standard for determining refractive error.
    • Advancements in optical technology and microprocessor-based electronics offer potential improvements in refraction systems.

    Purpose of the Study:

    • To evaluate a new refraction system (IVEX Refraction System) against traditional refractors.
    • To assess the accuracy of subjective refractions obtained with the new system.
    • To investigate the presence of "instrument myopia" with the new system.

    Main Methods:

    • A controlled study was conducted on subjects aged 14-25 years.
    • Exclusion criteria included ocular/systemic diseases and binocular problems.
    • Comparison of refractions from the IVEX system and a standard refractor.

    Main Results:

    • Data from the IVEX Refraction System highly correlated with the standard refractor.
    • A small amount of instrument myopia (0.25 D to 0.37 D) was detected in most subjects.
    • The system demonstrated high accuracy in subjective refraction.

    Conclusions:

    • The IVEX Refraction System provides subjective refractions comparable to traditional methods.
    • Clinicians should be aware of the potential for a small degree of instrument myopia.
    • The new system shows promise for accurate refractive error assessment.

    Related Experiment Videos