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 14 of 14 for “"scotopic"”.
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Scotopic sensitivity/Irlen syndrome and reading in college level students
… investigated whether a recommended treatment for Scotopic Sensitivity/Irlen Syndrome (SS/IS), colored overlays, was more effective in improving reading disabled college students' reading scores than either reading skills instruction or no treatment. It was hypothesized that subjects using colored …
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Scotopic Vision: Behavioral Sensitivity and Underlying Optical and Neural Factors
… 8 log-unit range of adaptation levels spanning scotopic and mesopic vision. Over the same luminance range, contrast thresholds were measured for neurons in the cat dorsal lateral geniculate (LGNd) and medial interlaminar (MIN) nuclei. Behavioral sensitivity was measured for 7 spatial frequencies …
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Visual performance in the mesopic range
… 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 contrast …
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Spatial and temporal aspects of visual performance in relation to light level and normal aging
… The third study determined whether altering the scotopic/photopic luminous efficiency ratio could improve spatial acuity at mesopic light levels. This was achieved by altering the spectral power distribution of illuminating lights to increase the contribution of rods to vision at constant levels …
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Dynamic Visual Performance Characteristics of Elderly Drivers
… 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 between …
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Ablation of Retbindin, the Riboflavin Binding Protein, Exacerbates Retinal Degenerative Phenotypes in Mouse Models of Human Retinal Diseases
… the models led 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) …
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Spectral qualities of light: effects on human perception and the human visual system
… the greater VA. Per the formula, increased scotopic (V’(λ)) lumens result in smaller pupils. A rearrangement of the P(S/P)ˣ formula provided a mathematical means for quantifying an illuminance reduction, later established by the IES as Equivalent Visual Efficiency (EVE) Factors. In theory, …
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S-nitrosylation mediates synaptic plasticity in the retina
… the loss of visual information carried by dim scotopic signals. Finally, our results may set the framework for exploring the role of S-nitrosylation in certain neurodegenerative retinal diseases that are associated with toxic levels of NO.
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The Effect of Age on Dark Focus Distance and Visual Information Transfer Rate
… were conducted under nighttime condition (scotopic vision) in a laboratory setting. A total of forty participants with normal vision or corrected to normal vision were recruited from four different age groups (younger: 26.9±5.0 years; middle-aged: 50.7±4.8 years; young-old: 64.6±2.8 years; …
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Structure-function relationships in Age-related macular degeneration in an era of multi-modal retinal imaging
… performance on a novel piece of equipment, the scotopic MAcular Integrity Assessment (MAIA, CenterVue, Padova, Italy) microperimeter, as well as the repeatability of the device are tested. <br/><br/>In chapter 3, the rationale and methods of developing an optical coherence tomography (OCT)-based …
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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 …