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

Changes in ocular dimensions and refraction with accommodation

L F Garner1, M K Yap

  • 1Department of Optometry, University of Auckland, New Zealand.

Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)
|January 1, 1997
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

History of nursing at Baylor University Medical Center.

Proceedings (Baylor University. Medical Center)·2005
Same author

The Nepal longitudinal study: predicting myopia from the rate of increase in vitreous chamber depth.

Optometry and vision science : official publication of the American Academy of Optometry·2004
Same author

The effect of light scattering on multifocal electroretinography.

Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)·2002
Same author

Gradient refractive index of the crystalline lens of the Black Oreo Dory (Allocyttus Niger): comparison of magnetic resonance imaging (MRI) and laser ray-trace methods.

Vision research·2001
Same author

The spherical aberration of the crystalline lens of the human eye.

Vision research·2001
Same author

Refractive errors in Singapore and Xiamen, China--a comparative study in school children aged 6 to 7 years.

Optometry and vision science : official publication of the American Academy of Optometry·2000
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

Changes in the crystalline lens

Area of Science:

  • Ophthalmology
  • Optics
  • Physiological Optics

Background:

  • Accommodation is the eye's ability to change focus.
  • The crystalline lens changes shape to focus light.
  • The posterior lens surface's role in accommodation is not fully understood.

Purpose of the Study:

  • To measure ocular dimension changes during accommodation.
  • To specifically analyze the posterior crystalline lens surface curvature.
  • To determine the contribution of the posterior lens surface to the eye's total refractive power change.

Main Methods:

  • Measured axial dimensions using A-Scan ultrasonography.
  • Assessed corneal radius of curvature via keratometry.
  • Determined lens surface radii of curvature using video phakometry.

Related Experiment Videos

  • Recorded refractive error with an auto-refractor.

    • Main Results:

    • At 8.00 D accommodation, anterior chamber depth decreased by 0.24 mm.
    • Lens thickness increased by 0.28 mm, with anterior and posterior radii decreasing.
    • Posterior lens surface contributed approximately one-third to the total increase in lens power.

    Conclusions:

    • The posterior crystalline lens surface significantly changes during accommodation.
    • These posterior surface changes contribute substantially to the overall increase in the eye's refractive power.
    • Accurate models of accommodation must account for posterior lens surface dynamics.