Stereo acuity and visual acuity in head mounted displays

2006 ◽  
Author(s):  
Frank L. Kooi ◽  
Piet Bijl ◽  
Pieter Padmos
Keyword(s):  
Visual Acuity ◽  
Head Mounted Displays ◽  
Stereo Acuity

scholarly journals Characterization of Visual Acuity and Contrast Sensitivity using Head-Mounted Displays in a Virtual Environment: A Pilot Study

2019 ◽  
Vol 63 (1) ◽  
pp. 547-551
Author(s):  
David Sproule ◽  
Rosemarie Figueroa Jacinto ◽  
Steve Rundell ◽  
Jacob Williams ◽  
Sam Perlmutter ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Virtual Reality ◽  
Pilot Study ◽  
Contrast Sensitivity ◽  
Virtual Environment ◽  
Real World ◽  
Appropriate Use ◽  
Head Mounted Displays ◽  
Visualization Tools

Virtual reality (VR) and personal head-mounted displays (HMDs) can be a viable tool for the presentation of scientifically accurate and valid demonstrative data in the courtroom. However, the capabilities and limitations of the technology need to be fully characterized. The current pilot study evaluated visual acuity and contrast sensitivity using two commercially available HMDs (Oculus Rift and HTC Vive Pro). Preliminary findings indicated that visual acuity and contrast sensitivity experienced in VR may be less than what is experienced in real-world scenarios. The current pilot study provides a quantitative approach for characterizing the limitations of VR with respect to visual acuity and contrast sensitivity, and provides recommendations for the appropriate use of this technology when performing forensic investigations and developing visualization tools.

Characterizing Visual Acuity in the Use of Head Mounted Displays

2021 ◽  
pp. 589-607
Author(s):  
Vladimir Soares da Fontoura ◽  
Anderson Maciel
Keyword(s):  
Visual Acuity ◽  
Head Mounted Displays

scholarly journals VISUAL IMPAIRMENT AND ENGAGEMENT IN COGNITIVELY STIMULATING ACTIVITIES

2019 ◽  
Vol 3 (Supplement_1) ◽  
pp. S656-S656
Author(s):  
Bonnielin Swenor ◽  
beatriz Munoz ◽  
Eleanor M Simonsick
Keyword(s):  
Visual Acuity ◽  
Visual Impairment ◽  
Significant Decline ◽  
Cross Sectional ◽  
Impaired Group ◽  
Cognitive Activities ◽  
Using Data ◽  
The Relationship ◽  
Stereo Acuity ◽  
Over Time

Abstract We examined the relationship between visual impairment (VI) and engagement in cognitively stimulating activities using data from 924 participants in the Cognitive Vitality Sub-Study of the Health ABC Study. At Year 3 (baseline for these analyses), vision was assessed as: visual acuity (VA), contrast sensitivity (CS), and stereo acuity (SA). Participation in cognitively stimulating activities was determined based on responses to 12 questions (administered at Years 3, 5, 7, and 9) assessing frequency of participation ranging from none to daily. We calculated the total number of activities engaged in at least monthly. In cross-sectional analyses adjusted for age, race, and sex, impaired VA (≤20/40, 8%), CS (<1.55, 5%), and SA (<80 secs arc, 29%) was associated with participation in fewer cognitive activities (β=-0.54, 95% CI:-1.06, -0.03; β=-0.59, 95% CI:-0.12, 0.06; β=-0.40, 95% CI:-0.81, -0.18, respectively). Longitudinally, change per year in the number of activities differed by baseline participation levels. Those participating in ≥5 activities at baseline (population median) had a significant decline in the number of activities, irrespective of VI status. However, for those participating in <5 activities at baseline, the increase in these activities tended to be lesser in the VI than in non-VI groups, and for SA this increase was significantly lower for the impaired group (βimpaired=0.004; 95% CI:-0.05, 0.05; βnot-impaired=0.06; 95% CI: 0.03, 0.10; time x SA interaction p=0.0496). These data indicate that older adults with VI participate in fewer cognitive activities and the change in participation over time differs from than those without VI.

Quantitative assessment of visual acuity in projective head-mounted displays

2003 ◽  
Author(s):  
Cali M. Fidopiastis ◽  
Catherine Meyer ◽  
Christopher A. Fuhrman ◽  
Jannick P. Rolland
Keyword(s):  
Visual Acuity ◽  
Quantitative Assessment ◽  
Head Mounted Displays

scholarly journals Fixational eye movements abnormalities and rate of visual acuity and stereoacuity improvement with part time patching

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Matteo Scaramuzzi ◽  
Jordan Murray ◽  
Paolo Nucci ◽  
Aasef G. Shaikh ◽  
Fatema F. Ghasia
Keyword(s):  
Visual Acuity ◽  
Eye Movements ◽  
Eye Movement ◽  
Duration Of Treatment ◽  
Fixational Eye Movements ◽  
Infantile Nystagmus ◽  
Part Time ◽  
Stereo Acuity ◽  
Clinical Subtype

AbstractResidual amblyopia is seen in 40% of amblyopic patients treated with part-time patching. Amblyopic patients with infantile onset strabismus or anisometropia can develop fusion maldevelopment nystagmus syndrome (FMNS). The purpose of this study was to understand the effects of presence of FMNS and clinical subtype of amblyopia on visual acuity and stereo-acuity improvement in children treated with part-time patching. Forty amblyopic children who had fixation eye movement recordings and at least 12 months of follow-up after initiating part-time patching were included. We classified amblyopic subjects per the fixational eye movements characteristics into those without any nystagmus, those with FMNS and patients with nystagmus without any structural anomalies that do not meet the criteria of FMNS or idiopathic infantile nystagmus. We also classified the patients per the clinical type of amblyopia. Patching was continued until amblyopia was resolved or no visual acuity improvement was noted at two consecutive visits. Children with anisometropic amblyopia and without FMNS have a faster improvement and plateaued sooner. Regression was only seen in patients with strabismic/mixed amblyopia particularly those with FMNS. Patients with FMNS had improvement in visual acuity but poor stereopsis with part-time patching and required longer duration of treatment.

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