Measurement of Central and Peripheral Dynamic Visual Acuity Thresholds during Ocular Pursuit of a Moving Target

Geer, Indira; Robertson, Kenneth M.

doi:10.1097/00006324-199307000-00006

Cited by 29 publications

(24 citation statements)

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“…The present study bears a superficial resemblance to previous studies of so-called dynamic visual acuity6 7 but differs importantly with regard to the characteristics of movement. The rates and amplitudes of movements employed here apparently were small enough to evade the deterioration that occurs under more extreme conditions.…”

Section: Discussionsupporting

confidence: 71%

Scope of super-resolution in central vision

Frisén¹

2009

British Journal of Ophthalmology

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Section: Discussionsupporting

confidence: 71%

Scope of super-resolution in central vision

Frisén¹

2009

British Journal of Ophthalmology

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“…DVA in the control group exhibited a tendency toward a decrease with increasing velocity. The overall pattern was generally consistent with previously reported findings in normal subjects [1] , [6] , [22] , implying the compatibility of our equipment and procedures.…”

Section: Discussionsupporting

confidence: 91%

“…Because the purpose of the present study was to discuss functional vision, binocular visual acuity was tested and then included in the following analysis. Speed levels were settled to cover the velocity ranges frequently encountered in daily life [1] , [5] , [6] , [19] , [24] . There were four speed levels for the DVA test, including 15, 30, 60 and 90 degree per second (dps).…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Dynamic visual acuity (DVA) refers to the ability to resolve a target visually when there is relative motion between the target and the observer [1] , [2] . Based on current research, the observer must rely on saccades and smooth pursuits to maintain foveal fixation on the image [1] , and the DVA signal is then transmitted by the magnocellular (M) pathway [3] , [4] . Relying on these mechanisms, DVA is a relatively independent visual parameter and is different from static visual acuity (SVA) [5] or contrast sensitivity [6] , the stimuli of which are captured by high-frequency tremors of the eye [1] and are then transmitted by the parvocellular (P) pathway [7] , [8] .…”

Section: Introductionmentioning

confidence: 99%

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Significant Improvement in Dynamic Visual Acuity after Cataract Surgery: A Promising Potential Parameter for Functional Vision

Huang

et al. 2014

PLoS ONE

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PurposeDynamic visual acuity (DVA) is a relatively independent parameter for evaluating the ability to distinguish details of a moving target. The present study has been designed to discuss the extent to which age-related cataract impacts DVA in elderly individuals and to determine whether it could be restored after bilateral phacoemulsification combined with intraocular lens implantation surgery.MethodsTwenty-six elderly cataract patients scheduled for binocular cataract surgery and 30 elderly volunteers without cataract were enrolled in the study. DVA at 15, 30, 60 and 90 degree per second (dps) was assessed, and velocity-dependent visual acuity decreases between consecutive speed levels were calculated.ResultsCompared with the control group, the patient group exhibited significantly worse DVA performance at all speed levels (p<0.001), and the decreases in velocity-dependent visual acuity were more serious in the patient group at the intervals of 0–15 dps (p<0.001), 15–30 dps (p = 0.007) and 30–60 dps (p = 0.008). Postoperatively, DVA performance at every speed level in the patient group clearly improved (p<0.001) and recovered to levels compatible to the control group. The decrease in visual acuity with increasing speed was less pronounced than during the preoperative phase (p0–15 dps = 0.001, p15–30 dps<0.001 and p30–60 dps = 0.001) and became similar to that of the control group. The postoperative visual benefit regarding DVA was more pronounced than the improvement in static visual acuity (p15 dps = 0.001 and p<0.001 at 30 dps, 60 dps and 90 dps).ConclusionsThe impact of age-related cataract on DVA was more severe than its effects on static visual acuity. After cataract surgery, not only static vision of the patients was restored markedly, but also the dynamic vision. DVA could be an important adjunct to the current evaluation system of functional vision, thereby meriting additional attention in clinical assessment.

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Visual search during dynamic displays: Effects of velocity and motion direction

Chen

Niu

et al. 2022

J Soc Info Display

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The visual search performance during dynamic environment has been demonstrated that could be affected by the motion of target and distractors. In present study, two experiments were conducted to investigate the effect of motion direction and velocity on visual search on screen. In Experiment 1, participants were required to complete the search task at three velocities(2, 8, and 16 deg/s) and four directions of motion(up, down, left, right). In Experiment 2, participants finished the more difficult visual search tasks within two directions (right, left) at higher velocities (16, 24, and 32 deg/s). The experiments revealed that the increase of velocity on the screen has a negative effect on the visual search performance, and when the velocity is higher than 8 deg/s, search times for horizontally moving images were shorter than those for vertically moving images. Furthermore, the difference in search performance could also be found in left‐moving and right‐moving images with the increase of velocity. Right‐moving images were proved to correspond to higher visual search performance. In addition, eye movement data indicated that saccade amplitude and saccade velocity might be responsible for this difference. The results of this study can be applied to industrial inspection, safety inspection, driving, and other fields.

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Measurement of Central and Peripheral Dynamic Visual Acuity Thresholds during Ocular Pursuit of a Moving Target

Cited by 29 publications

References 0 publications

Scope of super-resolution in central vision

Scope of super-resolution in central vision

Significant Improvement in Dynamic Visual Acuity after Cataract Surgery: A Promising Potential Parameter for Functional Vision

Visual search during dynamic displays: Effects of velocity and motion direction

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