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Related Experiment Video

Updated: Jul 5, 2026

In vivo Structural Assessments of Ocular Disease in Rodent Models using Optical Coherence Tomography
07:44

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Published on: July 24, 2020

Exploring ocular aberrations with a schematic human eye model.

George Smith1, Phillip Bedggood, Ross Ashman

  • 1Department of Optometry and Vision Sciences, The University of Melbourne, Parkville, Vic, Australia.

Optometry and Vision Science : Official Publication of the American Academy of Optometry
|May 3, 2008
PubMed
Summary
This summary is machine-generated.

Ocular aberrations change with age and accommodation. Modeling shows lens aberrations, not corneal ones, are the main source of change, impacting vision correction effectiveness.

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Area of Science:

  • Ophthalmic optics
  • Visual science
  • Biomedical engineering

Background:

  • Ophthalmic technologies enable measurement and reduction of ocular aberrations.
  • Ocular aberrations are dynamic, influenced by field position, accommodation, and age.
  • Static correction of aberrations may yield suboptimal vision improvement due to these dynamic changes.

Purpose of the Study:

  • Investigate the origin and dynamic changes of ocular aberrations.
  • Analyze how aberrations vary with field position, accommodation, and age.
  • Model the interplay between corneal and lenticular aberrations.

Main Methods:

  • Utilized an aspheric, variable-focus, age-dependent, gradient index schematic eye model.
  • Performed optical ray tracing using ZEMAX software.
  • Conducted Seidel aberration analysis with custom MATLAB software.

Main Results:

  • Modeled corneal aberrations partially balance lens aberrations.
  • Calculations support optical sculpting of corneal aberrations to balance lens aberrations.
  • Identified the gradient index distribution in the lens as the primary source of aberration changes with age and accommodation.

Conclusions:

  • Static correction can eliminate monochromatic aberrations for a single retinal point.
  • The isoplanatic patch defines a region of tolerable aberration.
  • Modeling results align with clinical findings on age- and accommodation-related aberration changes.