Visual Discomfort and Objective Measures of Static Accommodation

Chase, Chris; Tosha, Chinatsu; Borsting, Eric; Ridder, William H.

doi:10.1097/opx.0b013e3181ae1b7c

Cited by 72 publications

(77 citation statements)

References 31 publications

(34 reference statements)

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“…Several studies have found an effect of pattern glare/visual discomfort on accommodation (Allen et al, 2008;Chase et al, 2009;Tosha et al, 2009). Individuals who experience discomfort tend to have a greater lag of accommodation.…”

Section: Discussionmentioning

confidence: 99%

“…Similarly, Chase et al (2009) found a positive correlation between the accommodative lag in response to a 0.2m target and the visual discomfort scores from the Conlon Visual Discomfort Survey. Tosha et al (2009) also found that a group which reported high discomfort showed greater fatigue when sustaining accommodation at near distance (3-4D), even over a short time period (90s).…”

Section: Introductionmentioning

confidence: 99%

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Accommodation to Uncomfortable Patterns

et al. 2013

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Grating patterns can cause discomfort and perceptual distortions. Individuals who experience discomfort and are susceptible to these distortions generally show weaker accommodation than those who are less susceptible. We measured the accommodative response to grating patterns known to differ in the discomfort they evoke because of differences in their colour, motion or spatial frequency. The parameters known to affect discomfort and distortion had no influence on the mean or variance in the accommodative response, even when accommodative demand was manipulated systematically and the accommodative response varied as expected.3

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Accommodation to Uncomfortable Patterns

et al. 2013

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“…33 Accommodative insufficiency is known to lead to fatigue when reading; however, Chase et al 34 have shown that the common push-up measure of accommodation overestimates accommodative performance. A strong and positive correlation between accommodative lag and visual discomfort symptoms was found under near-work conditions by Chase et al 34 and they concluded that the prevalence of accommodative insufficiency was much higher than estimated by clinical measures when an open field autorefractor was used to assess accommodative lag. Others 35 have aso shown that accommodative lag increases more quickly in visually symptomatic readers, making blur more likely.…”

Section: Accommodative Lag and Visual Discomfortmentioning

confidence: 99%

Why do words jump? An exploration of visually symptomatic readers

Northway

2012

British and Irish Orthoptic Journal

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Aim: To provide an insight into the current issues in assessing visually symptomatic readers and the role of the orthoptist in the management of these patients. Methods: A literature-based review was undertaken to investigate the assessment of patients presenting with visual symptoms associated with reading. Areas related to binocular vision and visual stress, visual discomfort and illusions are covered. The importance of differentiating between the correction of visual discomfort and the correction of dyslexia is also highlighted.

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“…These factors are divided into the following two main categories: differences between retinal images [4][5][6][7][8][9], and mismatch between accommodation and convergence [10][11][12][13][14][15]. The experiment was conducted by using two different groups of participants: movies original3D and altered3D were compared in one group (referred to as the original3D-altered3D group), and movies 2D and altered3D were compared in the other group (referred to as the 2D-altered3D group).…”

Section: Introductionmentioning

confidence: 99%

Psychological and physiological effects of stereoscopic movies of real-world scenes containing improper three-dimensional settings

Watanabe

Ujike²

2013

Health

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By using psychological and physiological indicators, the effects on the body of three-dimensional (3D) movies containing improper settings were evaluated with 139 university students. The experiment consisted of two sessions: 1) a 3D movie containing improper 3D settings was compared with a 2D movie containing only the rightside images presented to both eyes, and 2) the original 3D movie was compared with the same 3D movie altered to contain improper 3D settings. The results of this experiment demonstrated clear deterioration of the subjective psychological indicators (degree of motion sickness after watching the movies and comfort level at 1-min intervals during the movie) with respect to the 3D movie containing improper settings. On the other hand, the physiological indicators (LF/HF ratio indicating the status of the autonomic nervous system) changed as a result of watching a 3D movie, but were unaffected by the presence or absence of improper 3D settings.

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Visual Discomfort and Objective Measures of Static Accommodation

Abstract: Accommodative insufficiency and fatigue should be defined and described by objective methods using extended viewing times to assess function.

Cited by 72 publications

References 31 publications

Accommodation to Uncomfortable Patterns

Accommodation to Uncomfortable Patterns

Why do words jump? An exploration of visually symptomatic readers

Psychological and physiological effects of stereoscopic movies of real-world scenes containing improper three-dimensional settings

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