Effects of Optical and Behavioral Factors on the Ocular Accommodation Response

A special issue of Vision (ISSN 2411-5150).

Deadline for manuscript submissions: 31 January 2025 | Viewed by 785

Special Issue Editors


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Guest Editor
Department of Optics, University of Granada, Granada, Spain
Interests: ocular accommodation; near triad; visual ergonomics; occupational optometry; visual performance; visual fatigue; digital eye strain; sport vision; neurological disorders

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Guest Editor
Centre for Vision across the Life Span, School of Applied Science, University of Huddersfield, Huddersfield, UK
Interests: sports vision; ocular accommodation; myopia; digital eye strain

Special Issue Information

Dear Colleagues,

The accommodative response is a relevant ability since it allows one to see clearly at different distances, and thus, it is of vital importance in numerous contexts. Accommodation can be stimulated from an alteration in the composition of the retinal image (optical factors), but also, it can be independent of the retinal image (behavioral factors). The optical factors are primarily associated with the characteristics of the visual stimulus, and they are part of a closed-loop system (e.g., blur), while behavioral factors are more influenced by task demands with a cognitive component, as well as individual cognitive and motivational characteristics. This Special Issue aims to collect articles focused on the effects of a variety of optical and behavioral factors on the accommodative response and its consequences in applied contexts, especially in activities performed at near working distances (e.g., computer work, reading, etc.). We are also keen to include articles that aim to elucidate the possible mechanisms underlying the influence of central nervous system alterations on ocular accommodation. Review articles, original research papers and case studies are all welcome.

Dr. Beatriz Redondo Cabrera
Dr. Niall Hynes
Guest Editors

Manuscript Submission Information

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Keywords

  • ocular accommodation
  • accommodative microfluctuations
  • cognitive effort
  • attention
  • fatigue
  • near work
  • visual performance

Published Papers (1 paper)

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Research

12 pages, 3448 KiB  
Article
The Effect of the Zonular Fiber Angle of Insertion on Accommodation
by Liying Feng, Barbara Pierscionek, Henk Weeber, Carmen Canovas Vidal and Jos J. Rozema
Vision 2024, 8(3), 45; https://doi.org/10.3390/vision8030045 - 23 Jul 2024
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Abstract
Purpose: With age, there is an anterior shift of the ciliary body in the eye, which alters the angle of zonular insertion in older eyes compared with younger eyes. This study aims to simulate lens accommodation with different zonular angles to consider the [...] Read more.
Purpose: With age, there is an anterior shift of the ciliary body in the eye, which alters the angle of zonular insertion in older eyes compared with younger eyes. This study aims to simulate lens accommodation with different zonular angles to consider the influence of zonular position on lens accommodative capacity. Methods: Models were constructed based on lenses aged 11, 29, and 45 years using a 2D axisymmetric structure that included a capsule, cortex, nucleus, and zonular fibers. The different zonular fibers were simulated by changing the position of the point where the zonular fibers connect to the ciliary body. The effect of the different zonular fiber insertion angles on the model shape and optical power was analyzed. Results: The models show that smaller angles made by zonular fibers to the surface of the lens lead to larger optical power changes with simulated stretching. When the models were stretched, and when varying the zonule angles, the optical power of the 11-, 29-, and 45-year-old models changed up to 0.17 D, 0.24 D, and 0.30 D, respectively. The effect of zonular angles on the anterior radius of curvature of the anterior surface varied by 0.29 mm, 0.23 mm, and 0.25 mm for the 11-, 29-, and 45-year-old models, respectively. Conclusions: Larger zonular fiber insertion angles cause smaller deformation and less accommodative change, while parallel zonules induce the largest change in lens shape. Full article
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