The Effect of Vibration on Visual Acuity with Electro-Optical Aids to Night Vision

1971 ◽  
Vol 13 (4) ◽  
pp. 369-378 ◽  
Author(s):  
Jo Ann S. Kinney ◽  
S. M. Luria ◽  
Howard Markowitz
Keyword(s):  
Visual Acuity ◽  
Night Vision ◽  
Optical Systems ◽  
Naked Eye ◽  
Power Standard

Visual acuity at a level of illumination comparable to overcast starlight was measured at various frequencies and amplitudes of vibration chosen to be representative of conditions aboard various ships. Measures were made with electro-optical scopes of four-power and one-power, standard Navy 7×50 binoculars, four-power field glasses, and the naked eye. Decrements in acuity under vibration were largest for the four-power scope and least for the naked eye. The decrements were, in fact, directly related to the original acuity level determined for the specific optical systems with no vibration. Despite the loss, vision with the four-power electro-optical aid remained superior to that with any other system under all conditions. The importance of antivibration mounts is emphasized.

Reproducibility of Night Vision Goggle Visual Acuity Measurements Using Landolt C's

1999 ◽  
Author(s):  
Alan Pinkus ◽  
H. L. Task ◽  
Sharon Dixon ◽  
Charles Goodyear
Keyword(s):  
Visual Acuity ◽  
Night Vision

scholarly journals Night vision in barn owls: Visual acuity and contrast sensitivity under dark adaptation

2012 ◽  
Vol 12 (13) ◽  
pp. 4-4 ◽  
Author(s):  
J. Orlowski ◽  
W. Harmening ◽  
H. Wagner
Keyword(s):  
Visual Acuity ◽  
Contrast Sensitivity ◽  
Dark Adaptation ◽  
Night Vision ◽  
Barn Owls

Distracted Driving and Driving Patterns in Older Drivers With Glaucoma

2021 ◽  
pp. 155982762110428
Author(s):  
Purva Jain ◽  
Jonathan T. Unkart ◽  
Fabio B. Daga ◽  
Linda Hill
Keyword(s):  
Visual Acuity ◽  
Visual Field ◽  
Visual Fields ◽  
Distracted Driving ◽  
Night Vision ◽  
Driving Ability ◽  
Safe Driving ◽  
Ability To Drive ◽  
Acuity Score

Limited research exists examining self-perceived vision and driving ability among individuals with glaucoma, and this study assessed the relationship between glaucoma, visual field, and visual acuity with driving capability. 137 individuals with glaucoma and 75 healthy controls were asked to evaluate self-rated vision, self-perceived driving ability, and self-perceived distracted driving. Visual acuity and visual field measurements were also obtained. Multivariable linear regressions were run to test each visual measure with driving outcomes. The average age was 72.2 years, 57.3% were male, and 72.5% were White. There were significant associations for a one-point increase in visual field and quality of corrected vision (RR = 1.06; 95% CI = 1.03–1.10), day vision (RR = 1.05; 95% CI = 1.03–1.08), night vision (RR = 1.08; 95% CI = 1.05–1.13), visual acuity score and higher quality of corrected of vision (RR = .41; 95% CI = .22-.77), day vision (RR = .39; 95% CI=.22–.71), and night vision (RR = .41; 95% CI = .18–.94); visual acuity score and ability to drive safely compared to other drivers your age (RR = .53; 95% CI = .29–.96). Individuals with poorer visual acuity and visual fields rate their vision and ability to drive lower than those with better vision, and this information will allow clinicians to understand where to target interventions to enhance safe driving practices.

scholarly journals Unexpected Genetic Cause in Two Female Siblings with High Myopia and Reduced Visual Acuity

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
M. N. Preising ◽  
C. Friedburg ◽  
W. Bowl ◽  
B. Lorenz
Keyword(s):  
Visual Acuity ◽  
High Myopia ◽  
Autosomal Recessive ◽  
Electrical Coupling ◽  
Splice Site Mutation ◽  
Bipolar Cells ◽  
Night Vision ◽  
Site Mutation ◽  
Frequent Finding ◽  
Biallelic Mutations

In daily life, myopia is a frequent cause of reduced visual acuity (VA) due to missing or incomplete optical correction. While the genetic cause of high myopia itself is not well understood, a significant number of cases are secondary to hereditary malfunctions or degenerations of the retina. The mechanism by which this occurs remains yet unclear. Two female siblings, 4 y and 2 y, respectively, from a consanguineous Pakistani family were referred to our department for reduced VA and strabismus. Both girls were highly myopic and hence were further examined using standard clinical tests and electroretinography (ERG). The latter confirmed confounded electrical coupling of photoreceptors and bipolar cells. Further inquiry and testing confirmed a similar condition for the father including impaired night vision, reduced VA, photophobia, and an equally characteristic ERG. Findings in the mother were unremarkable. Subsequent genetic analysis of autosomal recessive and X-linked genes for congenital stationary night blindness (CSNB) revealed a novel homozygous splice site mutation in CACNA1F in the two girls transmitted from both the father and the mother. While in males the above clinical constellation is a frequent finding, this report, to the authors’ knowledge, is the first demonstrating biallelic mutations at the CACNA1F locus in females.

A Comparison of Visual Acuity Performance between a Binocular Night Vision Goggle and Two Types of Monocular Night Vision Goggles

1980 ◽  
Vol 24 (1) ◽  
pp. 306-309
Author(s):  
Robert M. Waters ◽  
Larry W. Avery
Keyword(s):  
Visual Acuity ◽  
Depth Perception ◽  
Low Cost ◽  
Light Level ◽  
Night Vision ◽  
Low Light ◽  
Light Intensification

Two experiments were run comparing the operational binoculars AN/PVS-5 Night Vision Goggles with two monocular low cost night vision goggles using newer light intensification techniques. No decrement in performance was noted in visual acuity or depth perception with the monocular low cost goggles; an improved capability was noted with the new goggles in low light level conditions.

Examining the effect and safety of orthokeratology in controlling the development of myopia: Based on fluorosilicone acrylic breathable material

2020 ◽  
Vol 10 (5) ◽  
pp. 740-747
Author(s):  
Yanxia Song ◽  
Haixia Tian ◽  
Suling Yang ◽  
Feifan Du ◽  
Huihui Sun ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Intraocular Pressure ◽  
Axial Length ◽  
Corneal Endothelium ◽  
Clinical Effect ◽  
Naked Eye ◽  
Corrected Visual Acuity ◽  
Significant Difference ◽  
Before And After

We aimed to evaluate the clinical effect and safety of orthokeratology in controlling the development of myopia. We assessed the changes in visual acuity, diopter change, axial length, corneal endothelium count, intraocular pressure, and corneal Q value in 30 adolescents with 60 years of wearing an orthokeratology lens. In this study, no significant difference was observed between the naked eye vision and corrected visual acuity before wearing the lens (t = –0.23, P = 0.59); furthermore, no significant difference was observed in diopter, axial length, corneal endothelium count, and intraocular pressure 1 year before and after wearing the lens (t = 1.24, P = 0.45; t = –0.89, P = 0.25; t = –0.43, P = 0.57; t = 1.43, P = 0.61); by contrast, there was a significant difference in the corneal Q value before and after wearing the lens (t = –8.37, P = 0.001). These results suggest that the fluorosilicone acrylic breathable material corneal orthopedic lens is safe and effective in controlling myopia, and has little effect on the physiology of the eye.

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