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C/DControl Data
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C/DCup-to-Disc Ratio (ophthalmology)
C/DCompression/Distraction (bone fractures)
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References in periodicals archive ?
Dyer et al., "The path to open-angle glaucoma gene discovery: Endophenotypic status of intraocular pressure, cup-to-disc ratio, and central corneal thickness," Investigative Ophthalmology & Visual Science, vol.
Eye pressures taken were 13 mmHg OD and 11 mmHg OS and a cup-to-disc ratio of less than 0.1 bilaterally (OU) as shown in Figures 1 and 2.
OCT can be used to analyze and measure not only the peripapillary RNFL thickness [3-5] but also topographic parameters of the ONH, including the disc area, neuroretinal rim area, and the cup-to-disc ratio [6].
Optic disc parameters on optical coherence tomography in patients with nonglaucomatous retinal nerve fiber layer damage Mean Standard deviation Minimum Maximum Average RNFL thickness ([micro]m) 79.7 20.3 52 117 Rim area ([mm.sup.2]) 1.5 0.4 1.1 2.1 Disc area ([mm.sup.2]) 1.8 0.2 1.5 2.1 Average C/D 0.4 0.2 0.1 0.6 Vertical C/D 0.4 0.2 0.1 0.6 Cup volume ([mm.suyp.3]) 0.1 0.1 0 0.2 C/D: Cup-to-disc ratio, RNFL: Retinal nerve fiber layer Table 2.
Objective: To evaluate the correlation between Central Corneal Thickness (CCT) and Visual Field (VF) defect parameters like Mean Deviation (MD) and Pattern Standard Deviation (PSD), Cup-to-Disc Ratio (CDR) and Retinal Nerve Fibre Layer Thickness (RNFL-T) in Primary Open-Angle Glaucoma (POAG) patients.
Peto, "Measurement of optical cup-to-disc ratio in fundus images for glaucoma screening," in Proceedings of the 2015
Tirado et al., "Automatic cup-to-disc ratio estimation using active contours and color clustering in fundus images for glaucoma diagnosis," in ICIAR 2012: Image Analysis and Recognition, vol.
The automatic glaucoma detection technique processes this 2-D fundus image and identifies the Cup-to-Disc ratio. The image processing techniques such as image acquisition, future extraction, image enhancement, region segmentation and image classification are used to screen the glaucoma.
(1) The unaffected eye often has a 'disc-at-risk' appearance with a small cup-to-disc ratio. (12) The pathogenesis of NAION is highly complex and is likely to be associated with small vessel disease involving the short posterior ciliary arteries with resultant hypoperfusion and infarction.
Results: Nonmydriatic camera was noted to have a sensitivity of 88.3% (159/180 images) and 100% in detecting diabetic retinopathy and abnormal cup-to-disc ratio, respectively.
An increase in the cup-to-disc ratio of the optic nerve head in combination with a decrease of the mean deviation in visual field testing was defined as glaucoma progression.