Web1 de mai. de 1981 · The mean cup-disk ratio in the group examined with the Hruby lens was 0.38 and that in the group examined with the direct ophthalmoscope was 0.25. With either method almost all eyes had cup-disk ratios of 0.7 or less. In 9% of the eyes the cup was ovoid. In only 10% of these cases was the vertical cup-disk ratio greater than the … Web12 de ago. de 2024 · Glaucoma is a chronic eye disease that leads to irreversible vision loss. The Cup-to-Disc Ratio (CDR) serves as the most important indicator for glaucoma screening and plays a significant role in clinical screening and early diagnosis of glaucoma. In general, obtaining CDR is subjected to measuring on manually or automatically …
Diagnostics Free Full-Text Performance Evaluation of Different ...
Web1 de dez. de 2012 · This study proposes a semi automated method for glaucoma detection using CDR and ISNT ratio of a fundus image. CDR (Cup to Disc Ratio) is ratio of area of Optic Cup to area of Optic Disc. WebWe determined the cup-disk ratios of 580 individuals, ranging in age from 4 to 91 years, with a Hruby lens; we also determined the cup-disk ratios of 289 of the 580 with a direct … chindits orde wingate
The Normal Cup-Disk Ratio - ScienceDirect
WebCup-to-disc ratio in patients with idiopathic intracranial hypertension is smaller than that in normal subjects. J Neuro-Ophthalmol 2010; 30:231–234 [Google Scholar] 15. Hayreh SS. Pathogenesis of oedema of the optic disc. Br J Ophthalmol 1964; 48:522–543 [PMC free article] [Google Scholar] 16. Lee AG ... WebFigure 1 A 45-year-old woman presented with gradual onset painless vision loss in the right eye was found to have a tuberculum sellae meningioma with suprasellar extension and compression of the right optic nerve. (A) Optic disc photographs show cupping in the right optic nerve as indicated by a larger cup-to-disc ratio.(B) Optic coherence tomography … WebA suspicious optic disc is one with a high degree of optic disc cupping. Generally if the cup-to-disc ratio is more than 0.5 – i.e., the vertical dimensions of the cup are more than half the total top-to-bottom distance of the disc – then there may be some degree of pathological cupping. Another cause for concern is asymmetry between the ... chindi weaving