WebThis type of crowded optic disc is frequently called a “disc-at-risk,” because of the well-established association between this condition and spontaneous AION.13We defined the “disc-at-risk” configuration as a cup-to-disc ratio of 0.2 or less. As it is difficult to accurately determine the cup-to-disc ratio in the presence of disc ... WebOptic nerve cupping progresses as the cup becomes larger in comparison to the optic disc. Both people with and without optic nerve damage have optic nerve cupping, although those with glaucoma tend to have a greater cup-to-disc ratio. A cup to disc ratio greater than six-tenths is generally considered to be suspicious for glaucoma.
Pearls for Correct Assessment of Optic Disc at Glaucoma Diagnosis
WebMay 1, 2003 · Optic disc findings frequently are noted before visual field deficits appear. 2, 12 Diagnostic findings include a symmetrically enlarged cup-to-disc ratio greater than 0.5 3 (Figures 3 and 4), cup ... http://www.medrounds.org/glaucoma-guide/2006/08/section-6-e-optic-nerve-examination.html iphone change default map app to waze
Cup-to-Disc Ratio in Idiopathic Intracranial Hypertension without ...
WebFeb 20, 2024 · The results of the correlation test using Spearman Test showed that there is no significant correlation (OD p = 0.115, OS p = 0.118) between the cup ratio and optic … WebThe optic nerve head : retinal nerve fiber opacification, elevation of the margins, hyperemia, and obliteration of the cup vascular features related to congestion: venous dilation, vascular tortuosity, hemorrhages, cotton wool spots, and exudates ( which can extend to the macula causing a macular star appearance). WebJun 27, 2015 · Anterior ischemic optic neuropathy (AION) was first described in 1974. 1 It results from non-perfusion of the posterior ciliary blood supply to the optic nerve head. 2 Classic symptoms of anterior ischemic optic neuropathy include sudden, painless vision loss, mild to severe vision loss, inferior altitudinal field defect, and optic disc edema, … iphone change from heic to jpg