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 22 for “"Perimetry"”.
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Improving measurements in perimetry for glaucoma
… and, if untreated, irreversible blindness. Perimetry is the clinical tool for assessing the functional ‘seeing’ part of the field of view (visual field) and is widely used in the detection and clinical monitoring of glaucoma. These measurements rely on a psychophysical response making them …
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Multifocal pupillographic objective perimetry in age-related maculopathy
… potential of multifocal pupillographic objective perimetry (mfPOP) in AMD. Our investigation began with the determination of the optimal features for centrally directed stimuli in multifocal pupillography. To overcome the effects of saturation and achieve high signal to noise ratios from stimuli …
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Multifocal pupillographic objective perimetry in age-related maculopathy
… potential of multifocal pupillographic objective perimetry (mfPOP) in AMD. Our investigation began with the determination of the optimal features for centrally directed stimuli in multifocal pupillography. To overcome the effects of saturation and achieve high signal to noise ratios from stimuli …
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Regression Analysis of Censored Data with Applications in Perimetry
This thesis treats regression analysis when either the dependent or the independent variable is censored. We deal with quantile regression when the dependent variable is censored. Using the independence between the true values and the censoring limits the quantile function for the true values can …
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Reclaiming the periphery: Kinetic perimetry in patients with glaucoma
Static automated perimetry of the central 30˚ is the most often used visual field test in glaucoma patients. Short test durations are achieved by focusing on a central region, which constitutes ~20% of the visual field. However, ignoring the periphery may sacrifice information on how patients are …
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Psychophysical aspects of clinical perimetry: studies in ageing and disease
… be addressed in the use of conventional clinical perimetry techniques include: How does CS change with age across the VF? Are static and kinetic perimetry results actually the same? Can factors causing increased measurement variability in perimetry be systematically quantified and eliminated? …
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Visual field and structural alterations in age-related macular degeneration
… for both standard and short-wavelength automated perimetry (SWAP). Factors known to influence the measure of visual field progression were considered, including the accuracy of the refractive correction on SWAP thresholds and the learning effect. Techniques of assessing the structure to function …
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A New Model for Assessment of Change in Visual Function in Diabetes
… purpose of this thesis was to determine whether perimetry using a new model to interpret deterioration or improvement in the visual field can be employed to assess change in visual function over time in diabetes. Diabetic retinopathy has long been considered a microvascular disease, but it is …
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Blau/Gelb-Perimetrie bei Patienten mit altersabhängiger Makulopathie
Short wavelength automated perimetry in age related maculopathy Age related maculadegeneration (AMD) is the most common cause for legal blindness in industrial countries. Previous studies reported the predictive value of the short wavelength sensitive (SWS) cone mediated sensitivity for visual …
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Improving visual field tests for populations with advanced glaucoma and visual field loss in the periphery
… regularly in clinical practice using static perimetry. These static tests are rapid and robust against human errors due to their testing strategies. However, approximately 80% of the rest of the visual field is less regularly examined due to the length of time it takes to measure, using both …
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PRESERVED GRIP SCALING TO UNSEEN OBJECTS FOLLOWING A UNILATERAL LESION TO V1 FOR IMMEDIATE BUT NOT DELAYED GRASPING
… that are deemed ‘blind’ on the basis of static perimetry tests. Here, we show that a patient with a complete right homonymous hemianopia after a V1 lesion remains sensitive to the width of objects presented in her blind field but only when reaching out to grasp them in ‘real-time’. A subsequent …
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Quantitative Gesichtsfeldbestimmung (QGFB) zur Beurteilung des Operationserfolges in der Chirurgie der Amotio retinae : Entwicklung einer Methode und Anwendung auf ein Patientenkollektiv
… could be quantified based on the hand-drawn perimetry sketches in the patients’ reports. The examination of quantitative perimetry with defined, differently configured test-fields proved the method to be reliable. So the method is also suitable for the quantification of the perimetric …
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Modellbasierte dreidimensionale Fundusrekonstruktion: ein genereller Ansatz zur Integration multi-modaler Daten des menschlichen Augenhintergrundes
… system has been developed to automate the micro-perimetry examination with the scanning laser ophthalmoscope accounting for eye movements. Automatic micro perimetry with fundus control until now was not possible due to involuntary eye movements of the patient and only manual control. A novel fast …
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Exploring retinal changes in Dementia and Multiple Sclerosis
… (UWFI), adaptive optics (AO) and widefield perimetry combined with recently developed image analysis methods and algorithms. <br/><br/><br/>In this thesis I present evidences that there are detectable changes on different eye imaging modalities that correlate with disease type and stage and …
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Evaluation hämodynamischer Effekte von Timolol, Dorzolamid und Latanoprost bei Patienten mit neu diagnostiziertem Offenwinkelglaukom
… in white- on-white or blue-on-yellow automated perimetry after either of the medications. AVP was significantly shortened after dorzolamide instillation (p=0.007) compared to baseline visit whereas neither timolol nor latanoprost resulted in a significant reduction. Peripapillary arterial and …
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Machine Learning Algorithms for Improved Glaucoma Diagnosis
… Optimized parameters from standard automated perimetry tests and OCT measurements of the nerve fibre layer derived from statistical processing to highlight statistically significant functional and structural changes, led to improvements in diagnostic accuracy. Moreover, the combination of …
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Effect of assessing glaucomatous optic disc changes using automated alternation flicker comparisons of serial optic disc stereophotographs
… tomography(OCT), and standard automated perimetry(SAP) in detecting progression of structural and functional glaucomatous damage. METHODS: A total of 83 eyes were selected randomly from patient records at authors’ institution. Serial sets of stereoscopic disc photography, SAP, and Stratus …
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En face OCT imaging for the assessment of glaucoma
… of reflectance analysis or its combination with perimetry appear viable and with significant potential for clinical examination of glaucoma.
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Knowledge Mining In The Clinical Assessment Of Glaucoma
… (VF), normally assessed with standard automated perimetry, which assesses the differential light sensitivity in the field of view. The clinical measurements of retinal structure and visual function play an important role in the detection and management of glaucoma, but the data generated is often …
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Verlaufsbeobachtung morphologischer und funktioneller Parameter bei verschiedenen Glaukomformen
… for the open angle glaucoma in the white-white-perimetry. The angle closure glaucoma and the open angle glaucoma showed a significnat improvment of the mean deviation in the blue-yellow-perimetry.Conclusion: In contrast to the conspicuously changed morphological prameters, the functional …
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