Measuring visual fatigue and visual discomfort associated with 3-D displays

This cross-sectional study analyses the usage patterns of the new communication and information technologies (ICTs) and their relationship with visual discomfort and musculoskeletal diseases in an intentional sample of 1259 workers of Spanish organizations. The usage pattern with the greatest incidence of visual and muscular-skeletal disorders, especially in the wrist and neck, combines the use of laptops and desktops during long working hours. However, the group of workers primarily using mobile devices and working mostly at mobile posts does not appear to be particularly vulnerable to the musculoskeletal diseases and visual fatigue. The ratio of taking a short pause per hour and the implantation of certain technical and preventive measures is related to lower incidence of disorders in the workers as a whole. Current usage of ICTs is very complex and should be addressed using empirical analysis of the different forms of usage and their impacts on health.

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Comparison of Visual Discomfort and Visual Fatigue between Head-Mounted Display and Smartphone

Electronic Imaging ◽

10.2352/issn.2470-1173.2017.14.hvei-146 ◽

2017 ◽

Vol 2017 (14) ◽

pp. 212-217 ◽

Cited By ~ 6

Author(s):

Jungmin Han ◽

Seon Hee Bae ◽

Hyeon-Jeong Suk

Keyword(s):

Visual Fatigue ◽

Visual Discomfort ◽

Head Mounted Display

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Effects of Display Curvature and Task Duration on Proofreading Task Performance, Visual Fatigue, Visual Discomfort, and Display Satisfaction

Proceedings of the Human Factors and Ergonomics Society Annual Meeting ◽

10.1177/1541931213601181 ◽

2016 ◽

Vol 60 (1) ◽

pp. 790-794 ◽

Cited By ~ 4

Author(s):

Sungryul Park ◽

Jihhyeon Yi ◽

Donghee Choi ◽

Songil Lee ◽

Gyouhyung Kyung ◽

...

Keyword(s):

Error Rate ◽

Polynomial Regression ◽

Viewing Distance ◽

Visual Fatigue ◽

Visual Discomfort ◽

Task Duration ◽

Two Factors ◽

Task Durations ◽

The Mean ◽

And Task

With more curved display products in the market and more exposure to such products, it is necessary to examine the effects of display curvature and task duration from the ergonomics perspective. The current study examined the effects of these two factors on visual performance, visual fatigue, visual discomfort, and display satisfaction during proofreading tasks. We incorporated five display curvatures (600R, 1140R, 2000R, 4000R, and flat) and five task durations (0, 15, 30, 45, and 60 min). Each of 50 individuals completed a 1-hr proofreading task at one of five display curvature conditions. The horizontal viewing distance was fixed at 600mm. Proofreading performance (speed and error rate), subjective visual fatigue [on ECQ (Eye Complaint Questionnaire)], physiological visual fatigue [CFF (Critical Fusion Frequency), blink duration, and blink frequency], visual discomfort (on VAS), and display satisfaction (on VAS) were measured. The highest mean proofreading speed was at 600R. The mean proofreading speed and error rate increased by 15.5% and 22.3%, respectively, over the 1-h task. The mean ECQ score and visual discomfort increased by 188.6% and 107.2% during 45 and 60 min of the task, respectively. The mean CFF and display satisfaction decreased by 0.49Hz and 11.2% during 15 and 15-45 min of the task. A polynomial regression model for subjective visual fatigue was developed (adjusted R2 = 0.6). These findings can be used when determining ergonomic display curvatures and predicting visual fatigue.

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Clinical examples of the effective correction of low astigmatism for improving vision

Clinical ophthalmology ◽

10.32364/2311-7729-2021-21-4-249-252 ◽

2021 ◽

Vol 21 (4) ◽

pp. 249-252

Author(s):

I.V. Lobanova ◽

◽

E.G. Rybakova ◽

T.B. Romanova ◽

◽

...

Keyword(s):

Binocular Vision ◽

Contact Lenses ◽

Optical Power ◽

Visual Fatigue ◽

Working Capacity ◽

Visual Discomfort ◽

Soft Contact Lenses ◽

Optical Correction ◽

Correction Of Astigmatism

In today’s world, the extensive visual load increases the demands on the quality of optical correction. Inadequate optical correction results in additional load on the accommodation system of the eye, increased fatigue, and complaints of asthenopia. Full optical correction is an essential requirement for the correct functioning of a visual analyzer. However, if baseline impairments of accommodation response (fusion) are not considered, full optical correction (eyeglasses or contact lenses) provokes visual discomfort. Daily disposable contact lenses (CL) with power change for each additional month is helpful in these cases, thereby allowing for a stepwise transition to the complete correction of ametropias and recovery of physiological accommodation, convergence, and better central and binocular vision quality. Prescription of spherical (not toric) CL, whose optical power was calculated by the spherical equivalent of sphero-cylindrical correction, is a typical error when correcting low astigmatism. This error negatively affects accommodative response and visual working capacity. A complete correction of astigmatism (even a low one) is required for visual recovery to reduce visual fatigue and improve working capacity and academic performance. When prescribing optical correction, binocular vision patterns and a dominant eye should be considered. Keywords: astigmatism, accommodation, binocular vision, visual discomfort, asthenopia, toric soft contact lenses. For citation: Lobanova I.V., Rybakova E.G., Romanova T.B. Clinical examples of the effective correction of low astigmatism for improving vision. Russian Journal of Clinical Ophthalmology. 2021;21(4):249–252 (in Russ.). DOI: 10.32364/2311-7729-2021-21-4-249-252.

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Psychology of Computer Use: XXXVI. Visual Discomfort and Different Types of Work at Videodisplay Terminals

Perceptual and Motor Skills ◽

10.2466/pms.1996.82.3.935 ◽

1996 ◽

Vol 82 (3) ◽

pp. 935-938 ◽

Cited By ~ 9

Author(s):

Caterina Rechichi ◽

Carmelo A. De Mojà ◽

Luigi Scullica

Keyword(s):

Word Processing ◽

Data Entry ◽

Visual Fatigue ◽

Visual Discomfort ◽

Different Types ◽

Chi Squared ◽

Vdt Operators ◽

The Relationship ◽

Data Checking ◽

Main Factor

The relationship between visual discomfort (or asthenopia) and different types of work using display units for 10,626 videodisplay terminal operators of the Italian Telecommunication Company was studied. Visual discomfort was evaluated as related to data entry, data checking, word processing, dialogue, enquiry, and various services. Chi-squared indicated that visual discomfort was not significantly related to any particular type of work for subjects with similar amounts of weekly time using videodisplay units. These findings are consistent with earlier results indicating that the main factor determining visual fatigue in VDT operators is the amount of time spent on the display units.

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