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Wavefront Changes during a Sustained Reading Task in Presbyopic Eyes.

Ebrahim Safarian Baloujeh1,2, José M González-Méijome3

  • 1Consejo Superior de Investigaciones Científicas (CSIC), Instituto de Nanociencia y Materiales de Aragón (INMA), 50009 Zaragoza, Spain.

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|June 27, 2024
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Summary
This summary is machine-generated.

Sustained reading temporarily alters wavefront error in presbyopic eyes, with higher-order aberrations increasing initially then decreasing. These dynamic changes may relate to lens displacement and biomechanics.

Keywords:
HOAZernike coefficientsaberrometryocular wavefront

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Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • Presbyopia, an age-related condition, affects near vision due to reduced accommodation.
  • Understanding visual changes after near work is crucial for presbyopic individuals.
  • Wavefront aberrations, particularly higher-order aberrations (HOA), impact visual quality.

Purpose of the Study:

  • To investigate the temporal effects of sustained reading on wavefront aberrations in presbyopic eyes.
  • To analyze specific coefficient changes (C20, C40, C3-1) and overall aberration metrics (RMS).
  • To explore potential biomechanical links to observed aberration dynamics.

Main Methods:

  • Wavefront aberrations measured using an IRX3 Shack-Hartmann aberrometer.
  • Measurements taken before and at intervals (immediately, 5, 10 min) after a reading task.
  • Analysis of total RMS, HOA RMS, and specific aberration coefficients (C20, C40, C3-1).

Main Results:

  • Median total RMS and HOA RMS increased immediately post-reading, then decreased.
  • Comatic aberration RMS followed a similar pattern, while spherical-like aberration RMS showed an opposite trend.
  • Observed patterns included V-shaped and inverse V-shaped coefficient changes, with significant inter-subject variability.

Conclusions:

  • Dynamic changes in higher-order aberrations occur after sustained near-vision tasks in presbyopia.
  • These HOAs may be influenced by crystalline lens displacement and biomechanical factors.
  • While patterns exist, considerable inter-subject variability necessitates further investigation.