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Updated: Jul 11, 2025

Quantification of Oculomotor Responses and Accommodation Through Instrumentation and Analysis Toolboxes
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Longitudinal changes in objective accommodative response, pupil size and spherical aberration: A case study.

Sotiris Plainis1,2, Sophia Panagopoulou1, W Neil Charman3

  • 1Laboratory of Optics and Vision (LOV), School of Medicine, University of Crete, Rethymno, Greece.

Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)
|November 15, 2023
PubMed
Summary
This summary is machine-generated.

The objective amplitude of accommodation declines linearly with age as presbyopia develops. Pupil constriction and reduced ocular spherical aberration (SA) may help reduce retinal image blur at higher accommodative demands.

Keywords:
accommodationageingpresbyopiapupilspherical aberration

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Area of Science:

  • Ophthalmology
  • Optometry
  • Physiological Optics

Background:

  • Studies indicate a decline in the accommodation response/stimulus curve slope as presbyopia progresses.
  • Age-related changes in pupillary miosis and ocular spherical aberration (SA) are observed.

Purpose of the Study:

  • To investigate longitudinal changes in monocular static accommodative response, pupil diameter, and SA in a single adult.
  • To examine the relationships between these parameters over 17 years until age 50.

Main Methods:

  • Utilized a wavefront analyzing system and Badal optometer for continuous recording.
  • Measured accommodative demands from -0.83 to 7.63 D.
  • Calculated accommodative response as equivalent refraction minimizing wavefront error; recorded pupil size and SA changes.

Main Results:

  • Accommodation response decreased with age, particularly at higher vergences.
  • Pupil diameter decreased with age, but its change rate with accommodation stimulus remained constant.
  • Spherical aberration (SA) changed linearly with accommodative response across all ages.

Conclusions:

  • Objective amplitude of accommodation declined linearly with age towards presbyopia.
  • The slope of the accommodation response/stimulus curve also decreased.
  • Pupil constriction and reduced SA likely mitigate retinal image blur from accommodative lag at higher stimuli.