Effects of Horizontal Acceleration on Human Visual Acuity  and Stereopsis

Horng, Chi‐Ting; Hsieh, Yih‐Shou; Tsai, Ming-Jen; Chang, Wei-Kang; Yang, Tzu-Hung; Yauan, Chien-Han; Wang, Chih‐Hung; Kuo, Wu‐Hsien; Wu, Yi–Chang

doi:10.3390/ijerph120100910

Cited by 11 publications

(5 citation statements)

References 75 publications

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“…From this experiment we can draw the following three conclusions which are applicable to both the TV and VR scenarios. Firstly, users performed better at the static visual acuity test than at the dynamic test which is in line with past studies [8], [31]. Secondly, dynamic acuity correlated with perception of impairment.…”

Section: Discussionsupporting

confidence: 90%

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Exploratory Study on User's Dynamic Visual Acuity and Quality Perception of Impaired Images

Letter¹,

All²,

Marez³

et al. 2020

Preprint

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In this paper we assess the impact of head movement on user's visual acuity and their quality perception of impaired images. There are physical limitations on the amount of visual information a person can perceive and physical limitations regarding the speed at which our body, and as a consequence our head, can explore a scene. In these limitations lie fundamental solutions for the communication of multimedia systems. As such, subjects were asked to evaluate the perceptual quality of static images presented on a TV screen while their head was in a dynamic (moving) state. The idea is potentially applicable to virtual reality applications and therefore, we also measured the image quality perception of each subject on a head mounted display. Experiments show the significant decrease in visual acuity and quality perception when the user's head is not static, and give an indication on how much the quality can be reduced without the user noticing any impairments.

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Section: Discussionsupporting

confidence: 90%

“…From the literature we learn that visual acuity declines when horizontal movement of the head increases due to an imperfect pursuit of eye movements, resulting in a continued image motion on the retina [8]- [10]. For television (TV) and VR, we expected to find a similar pattern.…”

Section: Introductionmentioning

confidence: 91%

Exploratory Study on User's Dynamic Visual Acuity and Quality Perception of Impaired Images

Letter¹,

All²,

Marez³

et al. 2020

Preprint

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“…To evaluate the stability of sharpness, the measurements were repeated 5 minutes later. Also, to check the repeatability and accuracy of VA, the measurements were compared to measurements recorded with a portable Rosenbaum pocket vision screener and E chart [19,20].…”

Section: Va=01+related Row Logarithm Value -(0034* Numbers Of Read Le...mentioning

confidence: 99%

Design and Construction of Chart Evaluating Quantity of Vision in Those Wearing Progressive Addition Lenses

Sagha

Nabovati²,

Jafarzadehpour³

2021

Func Disabil J

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Background and Objectives: Currently, there is no standard way to check the optimal fitting of Progressive Addition Lenses (PAL) and visual acuity variations when looking at different objects according to PAL’s production mechanism. We need a standard method to control PAL subjectively according to research on its monitoring. These topics are checked in this study. Methods: Two charts was designed for far and near distances using Persian letters and sentences with a logarithmic scale. Twelve subjects wearing PAL sat at 3 m and 30 cm distances, respectively, from far and near charts, and their visual acuity at Primary Position (Pp) and 15° up and down gazes, and 30° right and left gazes with single and progressive lenses were measured. To evaluate the stability of sharpness, measurements were repeated 5 minutes later. Also, to check the accuracy of vision, the measurements were compared to measurements recorded with a portable Rosenbaum pocket vision screener and E chart. Results: The correlations between Persian and E charts with PAL were confirmed in all gazes except pp. Mean visual acuity in all gazes except pp and 15° up gaze showed the difference in these charts. There are also mean differences in all gazes except 15° down gaze in near vision. Conclusion: Persian and Electronic charts are helpful to evaluate the visual acuity of those wearing PAL and fix the above-mentioned problems.

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“…In addition, within the horizontal vibration range of 0.2 to 0.8 Hz, motion sickness is closely related to the peak velocity of vibration [9][10] . In 2015, Horng C T et al demonstrated the effect of horizontal acceleration on human vision and stereo vision through experiments 11 . The subjective evaluation method is often used to evaluate the level of dizziness among passengers, including questionnaire surveys such as susceptibility to dizziness, dizziness assessment questionnaire, pain level scale, and symptom diagnosis method 12 .…”

Section: Introductionmentioning

confidence: 99%

Research on vehicle comfort testing and evaluation based on the characterization of passenger motion sickness degree

Xiang,

Zeng,

Ding

et al. 2024

Third International Conference on Biomedical and Intelligent Systems (IC-BIS 2024)

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In response to the demand of consumers for improving the comfort of electric vehicle driving, this article considers typical road scenarios and vehicle driving parameters, and designs an experiment to evaluate the degree of passenger motion sickness. Based on actual vehicle test data, the correlation between subjective motion sickness degree of passengers and objective physiological indicators is analyzed, and objective physiological indicators strongly related to subjective motion degree are identified. Subsequently, sensitivity analysis was conducted on the factors that affect correlation, and the trend changes of various physiological indicators with the degree of passenger motion sickness were explored. Research has found that there is a significant correlation between objective physiological indicators such as pupil diameter of eye movement signals and EDA of electrodermal signals and subjective degree of motion sickness, and this correlation is more sensitive to age. As subjective degree of motion sickness increases, pupil diameter and EDA of electrodermal signals show a clear trend. At the end of this article, a graded evaluation model for passenger motion sickness degree was constructed by weighting the combination of subjective and objective evaluation indicators, achieving scientific quantification and testing evaluation of passenger motion sickness degree, providing a reference for improving user driving comfort.

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Effects of Horizontal Acceleration on Human Visual Acuity and Stereopsis

Cited by 11 publications

References 75 publications

Exploratory Study on User's Dynamic Visual Acuity and Quality Perception of Impaired Images

Exploratory Study on User's Dynamic Visual Acuity and Quality Perception of Impaired Images

Design and Construction of Chart Evaluating Quantity of Vision in Those Wearing Progressive Addition Lenses

Research on vehicle comfort testing and evaluation based on the characterization of passenger motion sickness degree

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