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

Dynamic retinoscopy and accommodation.

H Whitefoot1, W N Charman

  • 1Department of Optometry and Vision Sciences, UMIST, Manchester, UK.

Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)
|January 1, 1992
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

Off-axis imagery through two multi-segment lenses for myopia treatment.

Biomedical optics express·2025
Same author

Winners in the 2012 Naylor prize competition.

Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)·2013
Same author

Depth resolution in stereoscopic systems.

Applied optics·2010
Same author

Three-dimensional TV system: addendum.

Applied optics·2010
Same author

Three-dimensional TV system.

Applied optics·2010
Same author

Astigmatism, accommodation, and visual instrumentation.

Applied optics·2010
Same journal

Mesopic Illumination in Natural Environments: Implications for Myopia Research.

Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)·2026
Same journal

Axial Length Growth Reference Curves and LMS Parameters for Japanese Children and Adolescents Aged 4-20 Years: The TMM BirThree Cohort Study.

Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)·2026
Same journal

Effect of Switching Myopia Control Strategies on Axial Elongation in Children with Poor Response to Highly Aspherical Lenslet Therapy.

Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)·2026
Same journal

Quantifying the Role of Longitudinal Chromatic Aberration and Age in Night Vision Disturbances.

Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)·2026
Same journal

Impaired Rod-Mediated Vision is the Functional Hallmark of Ageing and Early and Intermediate Age-Related Macular Degeneration.

Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)·2026
Same journal

Analytical Performance, Spatial Dynamics and Clinically Meaningful Change Thresholds for Automated Non-invasive Tear Film Assessment Using the Oculus Keratograph 5M.

Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)·2026
See all related articles

This study on dynamic retinoscopy found significant scatter in neutral values among normal subjects, limiting its use for detecting near response abnormalities. Individual variations in tonic accommodation largely explain this scatter in younger individuals.

Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • Assessing the eye's accommodative response is crucial for understanding visual function.
  • Dynamic retinoscopy and laser optometry are methods used to measure accommodation.
  • Tonic accommodation, or dark focus, represents the eye's resting accommodative state.

Purpose of the Study:

  • To determine the relationship between age and the added positive lens power needed for distance and near vision.
  • To compare dynamic retinoscopy findings with laser optometer measurements of accommodation.
  • To investigate the influence of tonic accommodation and near phoria on accommodative responses.

Main Methods:

  • Dynamic retinoscopy was performed on 221 clinically normal subjects (aged 10-80 years) to measure required lens power.

Related Experiment Videos

  • Laser optometry was used to measure accommodation levels under specific conditions.
  • Dark focus (tonic accommodation) was measured in a separate group of 58 subjects.

    • Main Results:

    • Mean dynamic retinoscopy results align with previous studies.
    • Significant scatter in neutral values was observed across all ages in normal subjects.
    • This variability limits the utility of dynamic retinoscopy for identifying abnormalities in near vision responses.

    Conclusions:

    • Individual variations in tonic accommodation are a major factor contributing to the scatter in neutral values, particularly in pre-presbyopic individuals.
    • Near phoria may also contribute to the observed variability in accommodative responses.
    • The wide range of normal responses suggests caution when interpreting dynamic retinoscopy results as indicators of visual dysfunction.