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Related Experiment Videos

Neutralization at infinity in streak retinoscopy.

P Boeder, H E Kolder

    Archives of Ophthalmology (Chicago, Ill. : 1960)
    |September 1, 1984
    PubMed
    Summary
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    [Electrophysiologic studies of the visual system].

    Fortschritte der Ophthalmologie : Zeitschrift der Deutschen Ophthalmologischen Gesellschaft·1983

    A novel retinoscopy technique places the neutralization endpoint at infinity, enhancing pupillary reflex clarity and speed. This method offers a more precise and distance-independent approach to refractive error assessment.

    Area of Science:

    • Ophthalmology
    • Optometry
    • Vision Science

    Background:

    • Traditional retinoscopy involves subjective endpoint determination.
    • Current methods can be influenced by observation distance and reflex quality.

    Purpose of the Study:

    • To introduce and evaluate a new principle of retinoscopy.
    • To define the endpoint of neutralization at infinity.

    Main Methods:

    • A new principle of retinoscopy was proposed.
    • The endpoint of neutralization was set at infinity.
    • A specific lens was used for "net" retinoscopy.

    Main Results:

    • The pupillary reflex is sharply defined and enhanced at neutralization.
    • Pupillary reflex width equals the smallest aperture diameter.

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  • Relative speed of the pupillary reflex is 1 (equal to scanning speed).
  • Neutralization at infinity is independent of observation distance.

    • Conclusions:

    • The proposed retinoscopy principle offers enhanced reflex characteristics.
    • Neutralization at infinity provides a more objective and reliable endpoint.
    • This method simplifies refractive error assessment by eliminating distance dependency.