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Full-Text Articles in Biomedical Engineering and Bioengineering
Intraocular Pressure Sensing And Control For Glaucoma Research, Simon Antonio Bello
Intraocular Pressure Sensing And Control For Glaucoma Research, Simon Antonio Bello
USF Tampa Graduate Theses and Dissertations
Animal models of ocular hypertension are important for glaucoma research but come with experimental costs. Available methods of intraocular pressure (IOP) elevation are not always successful, the amplitude and time course of IOP changes are unpredictable and irreversible, and IOP measurement by tonometry is laborious. This dissertation focuses on the development and implementation of two novel systems for monitoring and controlling IOP without these limitations. The first device consists of a cannula implanted in the anterior chamber of the eye, a pressure sensor that continually measures IOP, and a bidirectional pump driven by control circuitry that can infuse or withdraw …
Analysis And Processing Of Human Electroretinogram, Abdulrahman Mohammad Alaql
Analysis And Processing Of Human Electroretinogram, Abdulrahman Mohammad Alaql
USF Tampa Graduate Theses and Dissertations
Electroretinagram (ERG) is the recording of electrical activity of retinal cells elicited by light stimulation, which has been widely used to help diagnose different types of retinal dysfunctions. The ERG response signal is a short non-stationary signal that contains overlapping components. Different Digital Signal Processing (DSP) techniques are investigated using MATLAB to study the time-frequency responses of the ERG signal such as Short Time Fourier Transform (STFT), Continuous Wavelet Transform (CWT) and Discrete Wavelet Transform (DWT). The Photopic ERG signal was processed and analyzed in this thesis and the results of each technique have been investigated in detail. The Photopic …