Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 36 for “"colour vision"”.
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The time-course of colour vision
… each investigating temporal properties of colour vision processing in human observers. The first experiment replicates and extends an experiment by Stromeyer et al. (1991). We look for a phase difference between combined temporal modulations in orthogonal directions in colour space, which …
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The industrial consequences of deficiencies of colour vision
A number of industries involved with coloured products were surveyed to assess the role of visual colour judgement in the processes and determine the industrial handicap of defective colour vision. The colour vision testing policies of the individual companies were investigated and an attempt was …
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Investigations of polymorphic colour vision in new world primates
Primate colour vision in New World primates is intriguingly complex; show a polymorphism where males are obligatory dichromats (i.e. perception similar to colour-blind humans that cannot differentiate red from green) Females can be either dichromats or trichromats (vision similar to normal humans). …
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Smartdevices development for visual impairment and colour vision deficiency
… of an app-based system to assist those with vision impairment to better interact with mobile phones and computers achieving maximum advantages. In particular, the system helps to detect colour deficiency and can automatically adjust view screens to increase contrast and arrive at optimal view …
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Colour and Colour Vision in Late Nineteenth Century British Sciences
… and published sources to explore the origins of colour vision science in 19th century Britain. By drawing attention to wide ranging dialogues and disagreements between diverse figures with different visions of colour, including physicists David Brewster, James Clerk Maxwell, and Lord Rayleigh, …
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Strategies for teachers in support of learners with colour vision deficiency
… guidelines exist to accommodate learners with colour vision deficiency (CVD) in schools. Furthermore, teachers in South Africa are not formally trained in this field, resulting in them being unaware of and feeling ill-equipped to assist these learners. The purpose of the current study is to …
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Studies of normal and deficient colour vision with relevance to occupational environments
… thesis aim to assess the importance of normal colour vision in visually demanding, colour-related tasks that are often safety-critical and aim to improve our understanding of how congenital deficiencies can affect the processing of colour signals and the corresponding changes in visual …
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Possum magic : exploring colour vision in the common brushtail possum (Trichosurus vulpecula)
… into the diversity and evolution of mammalian colour vision has become even more exciting with the recent discovery of both trichromatic and dichromatic colour vision in the Australian marsupials. Our knowledge about these colour vision systems is limited, with a number of discrepancies in the …
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Possum magic : exploring colour vision in the common brushtail possum (Trichosurus vulpecula)
… into the diversity and evolution of mammalian colour vision has become even more exciting with the recent discovery of both trichromatic and dichromatic colour vision in the Australian marsupials. Our knowledge about these colour vision systems is limited, with a number of discrepancies in the …
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Evolution of colour vision in relation to colouration in weaverbirds (Family Ploceidae) and poison dart frogs (Family Dendrobatidae)
Of an organism’s physical traits, colouration is arguably one of the most important for biotic interactions and general fitness. Colouration can provide or deny critical information in mate choice and rival assessment, individual and species recognition, predator avoidance, prey acquisition, and …
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Is the Adams D-15 colour vision test a sensitive screening tool for ethambutol- and linezolid-induced optic neuropathy? A retrospective case series
… tool to detect early toxicity before permanent vision loss has occurred. Purpose: To evaluate the ability of the Adams D-15 colour vision test to detect early ethambutol- and linezolid-induced optic neuropathy. Methods: This was a retrospective case series of 15 patients who were screened for …
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Evolutionary genetics of CYP2J19 in red carotenoid pigmentation
… responsible for much of the bright yellow to red colours in animals and have been extensively studied as condition dependent signals in sexual selection. In addition to their function in coloration, carotenoids also play a crucial role in colour vision within certain lineages. Despite this, little …
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Výskyt očních vad u pacientek s Turnerovým syndromem
… there were hyperopia (24 %), epicanthus (20 %), colour vision deficiency (17 %), amblyopia (12 %), strabismus (10 %) and ptosis (5 %). Colour vision deficiency was defined as protanopia in 8.5 %, deuteranopia in 3.4 % and tritanopia in 5.2 %. The occurrence of colour vision deficiency was higher …
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Variability of chromatic sensitivity: fundamental studies and clinical applications
… sensitivity in "normal" trichromats and colour deficient observers. An important outcome was the development of a new method for accurate and efficient measurement of chromatic sensitivity and the establishment of reliable statistical limits that describe the distribution of redgreen(RG) …
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Visual Outcome Measures of Remyelination and Neuroprotection in Multiple Sclerosis
… coherence tomography (OCT), visual acuity and colour vision. It remains unclear which visual outcome measure, if any, is best suited for assessment of remyelination and neuroprotection for use in MS research and clinical trials of remyelination. During my PhD, I collected VEP, OCT, visual …
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Visual assessment of colour rendering. Volume One
… which made it possible to assess the C.I.E. Colour Rendering Index for fluorescent lamps by a simple visual testo Research !uork was done on filter devices in the laboratory, and the results processed by digital computer. The second part deals with a visual problem. Tests done using filter …
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Modelling grey-level intensities for smart phones to view medical images
… on Illumination (CIE) has recommended a colour appearance model CIECAM16 that can predict a colour appearance under many viewing conditions, e.g. an LCD display, as accurate as an average observer from human colour vision point of view. In this research, this colour appearance model is …
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Perception-Aware Optimisation Methodologies for Quantum Dot Based Displays and Lighting
Human colour vision acuity is limited. This presents opportunities to leverage these perceptual limits to achieve engineering optimisations for devices and systems that interact with the human vision system. This dissertation presents the results of few investigations we carried out into …
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