The Assessment of Visual Function and Functional Vision

Bennett, Christopher R.; Bex, Peter J.; Bauer, Corinna M.; Merabet, Lotfi B.

doi:10.1016/j.spen.2019.05.006

Cited by 92 publications

(80 citation statements)

References 80 publications

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“…Especially children born with visual deficits might not realize that their perception of the world is distorted. However, clinical tools to diagnose deficiencies in visual information processing and oculomotor functioning at an early age are limited 2 . Apart from visual and or oculomotor dysfunction, the child can show attentional or cognitive deficits, higher cortical visual processing, or language retrieval issues too 3 , 4 .…”

Section: Introductionmentioning

confidence: 99%

Visual fixations rather than saccades dominate the developmental eye movement test

Tanke

Barsingerhorn

Boonstra

et al. 2021

Sci Rep

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When children have visual and/or oculomotor deficits, early diagnosis is critical for rehabilitation. The developmental eye movement (DEM) test is a visual-verbal number naming test that aims to measure oculomotor dysfunction in children by comparing scores on a horizontal and vertical subtest. However, empirical comparison of oculomotor behavior during the two subtests is missing. Here, we measured eye movements of healthy children while they performed a digital version of the DEM. In addition, we measured visual processing speed using the Speed Acuity test. We found that parameters of saccade behavior, such as the number, amplitude, and direction of saccades, correlated with performance on the horizontal, but not the vertical subtest. However, the time spent on making saccades was very short compared to the time spent on number fixations and the total time needed for either subtest. Fixation durations correlated positively with performance on both subtests and co-varied tightly with visual processing speed. Accordingly, horizontal and vertical DEM scores showed a strong positive correlation with visual processing speed. We therefore conclude that the DEM is not suitable to measure saccade behavior, but can be a useful indicator of visual-verbal naming skills, visual processing speed, and other cognitive factors of clinical relevance.

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Section: Introductionmentioning

confidence: 99%

Visual fixations rather than saccades dominate the developmental eye movement test

Tanke

Barsingerhorn

Boonstra

et al. 2021

Sci Rep

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“…Ninety-eight eyes of 49 subjects, in total, with a median age of 19 (16)(17)(18)(19)(20)(21)(22)(23)(24) The median spherical refractive error on the rst visit in SCL group was − 2.00 spherical diopters (SD) with a range of -1.25 to -3.25 SD, and in RGPCL group − 1.75 SD with a range of -0.50 SD to -5.00 SD. On the rst visit, subjects in SCL group expressed no cylindrical power when calculating median value, although it ranged from 0 to -0.75 cylindrical diopters (CD).…”

Section: Resultsmentioning

confidence: 99%

“…Visual function de nes how well the eye and visual system work and it includes VA, CS, central and peripheral visual elds, TV, and glare sensitivity. Impairment of any of these parameters compromises visual function 18 . Several studies have demonstrated that visual performance can vary substantially depending on correction modality 1,2,3 .…”

Section: Discussionmentioning

confidence: 99%

Visual Acuity, Contrast Sensitivity Function, and Twilight Vision of Soft and Rigid Gas-Permeable Contact Lens Wearers

Krolo¹,

Kasumović²,

Radman³

et al. 2020

Preprint

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Aim of study was to assess the visual acuity (VA) before and after correction with soft and rigid gas permeable contact lenses (CLs) in healthy subjects, as well as their visual perfomance, including contrast sensitivity function (CSF), and twilight vision (TV). 60 eyes corrected with soft contact lenses (SCLs) and 38 eyes with rigid gas permeable contact lenses (RGPCLs) were enrolled in this prospective study. The following measurements were obtained: best spectacle–corrected visual acuity (BSCVA), best contact lens-corrected visual acuity (BCLCVA), TV, and CSF. Parameters were evaluated before and after CLs fitting and 2 months after the baseline. Exclusion criteria included anterior and posterior segment pathology, amblyopia, prior CLs wear, and ocular surgery. When analyzing TV, results showed superiority of CLs to the spectacle correction, with no statistical difference regarding the CL type. As for the CSF, RGPCLs were superior to both SCLs and spectacle correction. Visual performance was better in group fitted with RGPCLs oppose to SCLs group. CL wear improved visual performance compared to spectacles. This is the first prospective study to simultaneously investigate changes in VA, CS, and TV in SCL and RGCL wear, suggesting RGPCLs as the correction of choice for achieving optimal visual performance.

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“…Still, maintaining control over stimulus parameters in real-world studies can be difficult, and testing has often been limited to viewing static scenes. Despite these efforts, there still remains a need to develop adaptable and controllable stimuli for the purposes of investigating visual search performance using behavioral paradigms that can be considered as more ecologically valid ( Bennett, Bex, Bauer, & Merabet, 2019 ; Helbing, Draschkow, & Võ, 2020 ; Parsons, 2011 ; Parsons, 2015 ; Parsons & Duffield, 2019 ; for further discussion, see Holleman, Hooge, Kemner, & Hessels, 2020 ). In this direction, virtual reality (VR) has gained considerable interest as a way to approach issues related to task realism, immersion, adaptability, and experimental control, and it has even found a growing application in clinical and behavioral neuroscience research (for reviews, see Bouchard, 2019 ; Parsons & Phillips, 2016 ; Tarr & Warren, 2002 ).…”

Section: Introductionmentioning

confidence: 99%

“…From a clinical perspective, VR-based assessments may also be very helpful in characterizing higher order perceptual abilities and deficits that cannot be characterized using standard ophthalmic assessments such as visual acuity and visual field perimetry ( Bennett et al, 2019 ; Colenbrander, 2005 ). This is particularly relevant with respect to searching and tracking targets in a dynamic and complex scene.…”

Section: Introductionmentioning

confidence: 99%