The cup-to-disc ratio (often notated CDR) is a measurement used in ophthalmology and optometry to assess the progression of glaucoma. The optic disc is the anatomical location of the eye's "blind spot", the area where the optic nerve leave and blood vessels enter the retina. The optic disc can be flat or it can have a certain amount of normal cupping. But glaucoma, which is in most cases associated with an increase in intraocular pressure, often produces additional pathological cuppi… WebAIMS To evaluate the relation of the optic nerve head topographic measurements and age with the thickness of the retinal nerve fibre layer (RNFL) in normal Caucasoid subjects by means of scanning laser polarimetry and tomography. METHODS Topographic optic disc measurements and RNFL thickness values of 38 normal Caucasoid subjects of both …

Optic Disc Evaluation: Back to Basics - American Academy of Ophthalmology

WebApr 10, 2024 · Follow the patient every three months or so and watch the areas where the disc hemorrhage occurred to ensure the patient isn’t going to develop further progression in that area. It’s key to use the 10-2 visual field to avoid missing early defects or small changes in the central visual field. If vision is poor, a size-five stimulus must be ... WebAxial length, disc size, gender, age, and neuro-ophthalmic and retinal diseases, among other factors, can affect RNFL thickness. 8 Physicians must consider the possibility of confounding factors and assess data in RNFL reports within the context of the clinical picture. For example, quadrant and average RNFL thickness values will usually be ... is levi colwill injured

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WebOphthalmology 1998;105 (8) 1557 ... Disc size (disc area and horizontal and vertical diameters) and location (x- and y-coordinates of the geometric center of optic disc) for each of the 3 image types were calculated using software of our own design. All calculations were performed after aligning DP images with the corresponding OCT fundus ... WebSTEP ONE: THE OPTIC NERVE EXAM. Clinically measure the size of the optic disc. You may use the 5-degree aperture of a Welch Allyn direct ophthalmoscope, which is approximately 1.5 millimeters in diameter. A normal optic nerve approximates 1.7 to 1.8 mm in its vertical diameter. WebSTEP ONE: THE OPTIC NERVE EXAM. Clinically measure the size of the optic disc. You may use the 5-degree aperture of a Welch Allyn direct ophthalmoscope, which is … kg into liters