Peripapillary Choroidal Vascularity Index and Microstructure of Parapapillary Atrophy
نویسندگان
چکیده
منابع مشابه
Proton irradiation for peripapillary and parapapillary melanomas.
OBJECTIVE To examine ocular outcomes and survival after proton irradiation in patients with peripapillary and parapapillary melanomas ineligible for the Collaborative Ocular Melanoma Study. METHODS A total of 573 patients who received proton irradiation from January 4, 1985, through December 24, 1997, for tumors located within 1 disc diameter of the optic nerve, and therefore ineligible for t...
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PURPOSE A computer-aided measuring tool was devised to automatically detect and quantify both the parapapillary atrophy (PPA) and the optic disc (OD) regions in two-dimensional color fundus images of the retina. METHODS The OD region was segmented using the Chan-Vese model with a shape restraint. This region was then removed from the image (OD+PPA), which was cropped in a modified Chan-Vese a...
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Many reports of colobomata of the choroid, involving the peripheral choroid, are available in the literature, but no case of a localized congenital choroidal defect in the peripapillary region has bcen reported. A case of such colobomata present on both sides is reported here which, since coming under observation I0 years ago, has presented a considerable diagnostic problem to different ophthal...
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PURPOSE To estimate the relative importance of genes and environment in peripapillary atrophy type beta (beta-PPA) in a classic twin study. METHODS Female twin pairs (n = 506) aged 49 to 79 years were recruited from the St. Thomas' UK Adult Twin Registry. Peripapillary atrophy was identified from masked grading of stereoscopic optic disc photographs. Structural equation modeling was performed...
متن کاملUnderlying Microstructure of Parapapillary Deep-Layer Capillary Dropout Identified by Optical Coherence Tomography Angiography.
Purpose To characterize the microstructure underlying the parapapillary deep-layer microvasculature dropout (MvD) identified by optical coherence tomography (OCT) angiography (OCTA) in eyes with primary open-angle glaucoma (POAG). Methods Parapapillary MvD was defined as a focal sectoral capillary dropout without any visible microvascular network identified in deep-layer en face images obtain...
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ژورنال
عنوان ژورنال: Investigative Opthalmology & Visual Science
سال: 2019
ISSN: 1552-5783
DOI: 10.1167/iovs.18-26286