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Simulated Night And Day Driving Visual Acuity As Measured By The Titmus Vision Tester And The Snellen Acuity Chart
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Book Synopsis Simulated Night and Day Driving Visual Acuity as Measured by the Titmus Vision Tester and the Snellen Acuity Chart by : Jack Vincent Ferrara
Download or read book Simulated Night and Day Driving Visual Acuity as Measured by the Titmus Vision Tester and the Snellen Acuity Chart written by Jack Vincent Ferrara and published by . This book was released on 1970 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Driver Visual Limitations Diagnosis and Treatment by : David Shinar
Download or read book Driver Visual Limitations Diagnosis and Treatment written by David Shinar and published by . This book was released on 1977 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Night Vision Goggle Field-expedient Visual Acuity Adjustment Procedures by :
Download or read book Night Vision Goggle Field-expedient Visual Acuity Adjustment Procedures written by and published by . This book was released on 1996 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Army Night Seeing Tester, Development and Use by : Julius E. Uhlaner
Download or read book The Army Night Seeing Tester, Development and Use written by Julius E. Uhlaner and published by . This book was released on 1961 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comprehensive Vision Tests and Driving Record by : Alfred Crancer
Download or read book Comprehensive Vision Tests and Driving Record written by Alfred Crancer and published by . This book was released on 1969 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Validation of a Novel Dynamic Visual Acuity Test, and Examination of the Effects of Different Factors on Dynamic Visual Acuity by : Mariko Hirano
Download or read book The Validation of a Novel Dynamic Visual Acuity Test, and Examination of the Effects of Different Factors on Dynamic Visual Acuity written by Mariko Hirano and published by . This book was released on 2018 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Purpose: When a target is in motion, two thresholds can be measured: dynamic visual acuity (DVA, the smallest target size at which an observer can resolve target detail) and speed threshold (the fastest target speed at which an observer can resolve target detail). Many different factors can influence DVA and speed threshold, including target trajectory, velocity, size, contrast, and colour. The limitation with research to date is that there is no standardized, validated tool with which to assess either DVA or speed thresholds. The Vision & Motor Performance Lab at the University of Waterloo School of Optometry has recently developed a distance visual acuity chart (moV&, V&MP Vision Suite) that can measure static visual acuity, DVA, and speed thresholds. moV& allows for the specifications of target trajectory, speed, size, contrast, and colour of both the target and background when measuring DVA. The primary objective of this dissertation is to examine the validity and repeatability of the high contrast (100% contrast), low contrast (61% and 20% contrast), and colour (red target on a white background and white target on a blue background) functions of moV&. If reliable, the data will then be used to examine the effect of target trajectory, speed, and size on DVA and speed threshold. Methods: Three cross-sectional studies were conducted in order to address the research objectives. Each experiment required participants to attend 2 study visits separated by a minimum of 14 days. All participants completed the static visual acuity tests before completing the dynamic tests in a randomized order. Experiment 1 (n = 25) determined the validity and repeatability of moV& using targets at 100% contrast. At each visit, static and dynamic visual acuity was measured using Snellen, ETDRS, and moV& charts. Experiment 2 determined the repeatability of the low contrast and coloured functions of moV&. Participants were assigned to either the contrast (n=21) or colour (n=21) study block. For the contrast block, low contrast (61% and 20% contrast) static and dynamic visual acuities were measured using Snellen and moV& charts. For the colour block, coloured optotype and background (red target on a white background, white target on a blue background) static and dynamic visual acuities were measured using the ETDRS and moV& charts. Experiment 3 (n = 67) examined the effect of target trajectory, speed, and size on DVA and speed threshold using the targets studied in Experiments 1-2. Data from Experiments 1 and 2 was used to determine the effect of target trajectory, speed, and size on DVA and speed threshold. A repeated measure ANOVA was used to compare static moV& visual acuity to ETDRS and Snellen charts. Test-retest reliability was determined via Lin's correlation coefficient of concordance (CCC). Three-way ANOVA was used to determine the effect of trajectory, speed, and size on DVA and speed thresholds. Results: moV& yielded similar high contrast static visual acuity when compared to the EDTRS and Snellen charts. All high contrast static and dynamic visual acuities demonstrate good test-retest repeatability (CCCs ranged 0.451 to 0.953). moV& static visual acuities were significantly better than Snellen at both 61% and 20% contrast (p
Book Synopsis Manual on Drivers' Vision Test by : American Association of Motor Vehicle Administrators
Download or read book Manual on Drivers' Vision Test written by American Association of Motor Vehicle Administrators and published by . This book was released on 1949 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Some Tests of Night and Day Vision by : Charles A. Omarzu
Download or read book Some Tests of Night and Day Vision written by Charles A. Omarzu and published by . This book was released on 1968 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report introduces some tests of night and day vision which, though devised for a special purpose, are potentially useful in a much wider variety of applications. The tests are mostly of binocular visual acuity for far vision, measured either during the course of dark adaption or after adaption to various light levels has been completed. In addition, a special form recognition test has been developed to investigate the relationship between visual acuity data and the visibility of a 'real-life' shape, namely, the silhouette of a man. The test are implemented via specially developed slides to be used in a commercial vision test instrument. The latter has been adapted to provide a range of discrete nighttime and daytime light levels (through the use of neutral density filters). Unlike the slides normally provided with this instrument, those specially developd cover a wide range of contrast values. Thus, acuity may be tested over a wide range of contrasts at each of the nighttime and daytime light levels. (Author).
Book Synopsis Vision and Audition in Driving by : Robert L. Henderson
Download or read book Vision and Audition in Driving written by Robert L. Henderson and published by . This book was released on 1974 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Driving with Confidence by : Eli Peli
Download or read book Driving with Confidence written by Eli Peli and published by World Scientific. This book was released on 2002 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents a clear, no-nonsense discussion on the realities of low vision conditions together with a practical program designed to help low vision individuals maximize their chances for retaining and/or extending their driving privileges. Also provides a detailed description of driving vision regulations in every state in the US.
Book Synopsis Studies in Night Visibility by : National Research Council (U.S.). Highway Research Board
Download or read book Studies in Night Visibility written by National Research Council (U.S.). Highway Research Board and published by . This book was released on 1951 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Reanalysis of California Driver Vision Data by : B. L. Hills
Download or read book A Reanalysis of California Driver Vision Data written by B. L. Hills and published by . This book was released on 1977 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :New York University. Division of General Education. Center for Safety Education Publisher : ISBN 13 : Total Pages :12 pages Book Rating :4.:/5 (31 download)
Book Synopsis The Snellen Visual Acuity Test in Operators' License Examinations by : New York University. Division of General Education. Center for Safety Education
Download or read book The Snellen Visual Acuity Test in Operators' License Examinations written by New York University. Division of General Education. Center for Safety Education and published by . This book was released on 1940 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Reliability of Snellen Charts for Testing Visual Acuity for Driving: Prospective Study and Postal Questionnaire by : Z. Currie
Download or read book Reliability of Snellen Charts for Testing Visual Acuity for Driving: Prospective Study and Postal Questionnaire written by Z. Currie and published by . This book was released on 2000 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Visual Requirements in Night Driving by : Thomas Hugh Rockwell
Download or read book Visual Requirements in Night Driving written by Thomas Hugh Rockwell and published by . This book was released on 1970 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: 4 studies were made to assess the kind and intensity of visual data presented to the driver during nighttime driving.
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722214555 Total Pages :42 pages Book Rating :4.2/5 (145 download)
Book Synopsis Evaluation of Visual Acuity with Gen 3 Night Vision Goggles by : National Aeronautics and Space Administration (NASA)
Download or read book Evaluation of Visual Acuity with Gen 3 Night Vision Goggles written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-02 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using laboratory simulations, visual performance was measured at luminance and night vision imaging system (NVIS) radiance levels typically encountered in the natural nocturnal environment. Comparisons were made between visual performance with unaided vision and that observed with subjects using image intensification. An Amplified Night Vision Imaging System (ANVIS6) binocular image intensifier was used. Light levels available in the experiments (using video display technology and filters) were matched to those of reflecting objects illuminated by representative night-sky conditions (e.g., full moon, starlight). Results show that as expected, the precipitous decline in foveal acuity experienced with decreasing mesopic luminance levels is effectively shifted to much lower light levels by use of an image intensification system. The benefits of intensification are most pronounced foveally, but still observable at 20 deg eccentricity. Binocularity provides a small improvement in visual acuity under both intensified and unintensified conditions. Bradley, Arthur and Kaiser, Mary K. Ames Research Center ...
Book Synopsis Reproducibility of Night Vision Goggle Visual Acuity Measurements Using Landolt C's by :
Download or read book Reproducibility of Night Vision Goggle Visual Acuity Measurements Using Landolt C's written by and published by . This book was released on 1999 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main purpose of the study was to determine reproducibility limits of night vision goggle (NVG) acuity measurement under relatively high and low illumination levels. Psychometric acuity functions of three observers were repeatedly measured using Landolt C's as stimuli. The reproducibility limits of the Snellen acuity value (20/xx) relating to 50, 75 and 95% correct (adjusted for chance) were then determined. Reproducibility limit is defined as approximately 95% of all pairs of replications (20/xx) from the same illuminance and same observer, generated on different days, should differ in absolute value by less than the reproducibility limit. It was determined that for the lower illumination (8.61E-4 lux) at 50% corrected for chance probability level, the reproducibility limit was 5.1 Snellen acuity (20/xx) and for the higher illumination (1.38E-2 lux), 2.5 Snellen acuity. These limits were 17% and 13% of mean acuity, respectively.
