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 12 of 12 for “"photopic"”.
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The effect of aberrations and light scatter on visual performance at photopic and mesopic light levels
… and other parameters on the CAA test under photopic and mesopic conditions. This could help to provide explanations for previous CAA test results. The effect of contrast, stimulus onset time, pupil size and crowding on the CAA test was examined. This was in order to try to provide …
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Spatial and temporal aspects of visual performance in relation to light level and normal aging
… on spatial and temporal contrast sensitivity at photopic and mesopic light levels. The literature states that older people experience losses of retinal neurons including rods, cones and ganglion cells. Furthermore, older people tend to have particular difficulties with vision at low light levels …
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Visual performance in the mesopic range
… was successfully modelled as a function of photopic contrast, scotopic contrast, chromatic difference to the background and the level of illumination. The nonlinear relationship between search time and luminance contrast was found to change with reduction in light level, reflecting increased …
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Dynamic Visual Performance Characteristics of Elderly Drivers
… (information processing ability) under photopic and scotopic viewing conditions were thoroughly investigated in this study. Fifty-six individuals (28 young, 28 elderly) from the Montgomery County region were tested in the study in a mixed factorial repeated measures design with age as …
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The Isolation of Human Rod and Cone Photoreceptor Activity combining Electroretinography and Silent Substitution Techniques
… are optimal between 5 – 8 Hz and between 10-100 photopic Td. There is a significant correlation between the response amplitudes obtained with the silent substitution method and current standard clinical protocols. The results from the cone experiments showed that the L-, M- and S-cone stimulation …
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Direct Inputs to off Α and G9 Ganglion Cells From Aii Amacrine Cells In Rabbit Retina
… inputs to certain OFF ganglion cells in photopic conditions. This is known as crossover inhibition. Physiological evidence from several different labs implies that AII amacrine cells provide direct input to certain OFF ganglion cells. However, previous EM analysis of the rabbit retina …
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Ablation of Retbindin, the Riboflavin Binding Protein, Exacerbates Retinal Degenerative Phenotypes in Mouse Models of Human Retinal Diseases
… to significant reductions in both scotopic and photopic electroretinographic amplitudes, compared to the single mutants. Histologic assessments revealed severe thinning of diseased retinas upon elimination of Rtbdn. While the outer nuclear layer (ONL) cell counts in wild type (WT) and Rtbdn-/- …
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New objective and psychophysical techniques to study the processing of visual signals with emphasis on chromatic afterimages
… pupil responses to visual stimuli that isolate photopic luminance and colour in both the sighted and blind region of the visual fields on subjects with either acquired or congenital homonymous hemianopia. The measured pupil responses in the blind hemifield of patients with acquired cortical …
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Comparing Differentiated Rod And Cone Transcriptomes Reveals Rax As A Controller Of A Defined Cone Gene Regulatory Program
… mesopic (dark adapted) and an increase of the photopic (light adapted) responses were found. <br></br><br></br> <b>Conclusion</b><br></br> We showed that the “double fluo” provided a robust method to isolate and cross-compare rod and cone photoreceptors in the adult porcine retina upon …
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The use of silent substitution in measuring isolated cone- & rod- human electroretinograms. An electrophysiological study of human rod- and cone- photoreceptor activity derived using silent substitution paradigm
After over a decade of its discovery, the Electroretinogram (ERG) still remains the objective tool that is conventionally used in assessment of retinal function in health and disease. Although there is ongoing research in developing ERG- recording techniques, interpretation and clinical …
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Photographing the invisible: A practice based photographic investigation of different environments using peripheral vision as a phenomenological narrative on the consciousness of space and place
There can be a distancing effect in our interaction with the environment and it can be reduced to a spectacle rather than a multisensory experience through our use of photography. This practice-based research investigates the use of still photography to capture our peripheral interaction with the …
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Photographing the invisible: A practice based photographic investigation of different environments using peripheral vision as a phenomenological narrative on the consciousness of space and place
There can be a distancing effect in our interaction with the environment and it can be reduced to a spectacle rather than a multisensory experience through our use of photography. This practice-based research investigates the use of still photography to capture our peripheral interaction with the …