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In this paper, an undulated micro-electrode array (MEA) on polyimide is fabricated and evaluated for retinal prosthesis. The undulated MEA consists of the individual micro-electrodes having arrowhead shapes and varying heights of 50 ~150 mum. The proposed device is implanted in a rabbit eye, and an optical coherent tomography (OCT) image is taken. The OCT image shows that the implanted MEA contacts...
Computer-based objective measurement of the ocular cyclotorsion using digital fundus photograph was developed. Color digital fundus photographs acquired with the field angle of 60/spl deg/, 1520 /spl times/ 1080 in resolution were analyzed. Optic disc and macula were segmented by the program developed on MATLAB, which executed the serial analysis of the Otsu threshold, labeling, Canny edge. The angle...
Stereo disc photograph was analyzed and reconstructed as 3 dimensional contour image to evaluate the status of the optic nerve head for the early detection of glaucoma and the evaluation of the efficacy of treatment. Stepwise preprocessing was introduced to detect the edge of the optic nerve head and retinal vessels and reduce noises. Paired images were registered by power cepstrum method and zero-mean...
Quantitative analysis of the retinal nerve fiber layer (RNFL) defect is prerequisite in the early detection and management of glaucoma. A new automatic quantification method to evaluate the degree of RNLF defect has been proposed in this paper. Simple image processing technique is applied to locate optic disc and intensity of the pixels around optic disc is plotted. The area with RNFL defect can be...
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