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    Contrast sensitivity and glare: new measurement techniques and the visual consequences of wearing head-mounted displays

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    PhD Thesis (4.452Mb)
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    Publication date
    2016
    Author
    Longley, Christopher I.
    Supervisor
    Whitaker, David J.
    Keyword
    Disability glare
    Binocular summation
    Binocular inhibition
    Google Glass
    Contrast sensitivity clock (CSC)
    Contrast sensitivity (CS)
    Head-mounted display (HMD)
    Rights
    Creative Commons License
    The University of Bradford theses are licenced under a Creative Commons Licence.
    Institution
    University of Bradford
    Department
    Faculty of Life Sciences
    Awarded
    2016
    
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    Abstract
    The main aim of this thesis was to evaluate the performance of the contrast sensitivity clock (CSC), a new screening device for measuring contrast sensitivity (CS) and glare. This device allows CS without glare, with glare and disability glare scores to be recorded. After initial data collection the design of the CSC was slightly amended improving the performance of the device. The amended design of the CSC was shown to be a valid, discriminative and repeatable measure for purpose. The CSC is also a quick test to perform and is relatively cheap to produce. If all these factors are considered it shows potential to become the test of choice for the assessment of visual glare. A head-mounted display system was also evaluated in terms of the glare effects it may cause. The monocular display screen of the device significantly reduced the CS of the eye directly exposed but also had an effect on binocular performance, reducing amounts of binocular summation. Electronic devices, including head-mounted displays and satellite navigation systems can seriously affect CS at low luminance levels, similar to those found when driving at night.
    URI
    http://hdl.handle.net/10454/16061
    Type
    Thesis
    Qualification name
    PhD
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    Theses

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