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Quantification of Oculomotor Responses and Accommodation Through Instrumentation and Analysis Toolboxes
08:27

Quantification of Oculomotor Responses and Accommodation Through Instrumentation and Analysis Toolboxes

Published on: March 3, 2023

Accommodation response and visual discomfort.

Chinatsu Tosha1, Eric Borsting, William H Ridder

  • 1Jules Stein Eye Institute, UCLA, Los Angeles, CA, USA.

Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)
|October 14, 2009
PubMed
Summary
This summary is machine-generated.

College students experiencing high visual discomfort showed signs of accommodative fatigue during prolonged near work. Their accommodative lag increased over time, unlike those with low discomfort.

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Area of Science:

  • Optometry
  • Ophthalmology
  • Vision Science

Background:

  • Visual discomfort symptoms are often linked to near work but objective measures of accommodation have not shown deficits.
  • Previous studies may have been too brief to accurately assess accommodative fatigue.

Purpose of the Study:

  • To investigate steady-state accommodative responses over a 90-second period in college students with varying levels of visual discomfort.
  • To determine if prolonged near work reveals differences in accommodative function between high and low visual discomfort groups.

Main Methods:

  • Thirty-one college students were divided into high (n=15) and low (n=16) visual discomfort groups based on survey scores.
  • Accommodation responses were objectively measured using a WAM-5500 autorefractor at 5 Hz for two minutes across five viewing distances.

Main Results:

  • A significant interaction over time was observed between the high and low visual discomfort groups regarding accommodative response.
  • The high visual discomfort group exhibited an increasing accommodative lag, while the low discomfort group maintained a stable response.

Conclusions:

  • The high visual discomfort group demonstrated accommodative fatigue, indicated by a developing lag of accommodation during near viewing over time.
  • Objective measurement of accommodative function over extended periods is crucial for understanding visual fatigue in near work.