Optic disc segmentation is a prerequisite in automatic analysis of retinal disease in color fundus images. In this paper, an algorithm for detection of optic disc (OD) in fundus images is presented. Mathematical morphology is used for segmentation of candidate optic disc region, followed by determining its center and approximating the circular optic disc boundary using circular model. Proposed ...

The association between post-traumatic optic disc pallor and traumatic choroidal rupture is poorly understood. To further define this relationship, nine cases of indirect traumatic choroidal rupture and post-traumatic optic disc pallor were compared with cases of indirect choroidal rupture without disc pallor in terms of severity of ocular injury, fundus findings, and visual outcome. The type a...

PURPOSE To compare the rates of detection of optic disc hemorrhages by clinical examination and by review of optic disc photographs at the Optic Disc Reading Center (ODRC), to assess the incidence of and the predictive factors for disc hemorrhages in the annual disc photographs of the Ocular Hypertension Treatment Study (OHTS), and to determine whether optic disc hemorrhages predict the develop...

purpose: to evaluate the relationship between central corneal thickness (cct) and optic disc area in patients with primary open angle glaucoma (poag). methods: the study was performed on patients with poag who were being followed at johns hopkins hospital. all patients underwent thorough eye examination, optic disc imaging with the heidelberg retina tomograph ii (hrt ii), and ultrasound corneal...

Non-arteritic anterior ischaemic optic neuropathy (NAION) is a widespread visually disabling disease in the middleaged and elderly population. Based on clinical observations by Hayreh, Beck, Savino and others, a low cup/disc diameter ratio and a small optic disc have been described to be structural factors associated with the disease. The physiological correlation between disc size and cup/disc...

Optic disc (OD) detection is a main step while developing automated screening systems for diabetic retinopathy. Optic disc boundary and localization of macula are the two features of retina was necessary for the detection of exudates and also knowing the severity of the diabetic maculopathy. According to the prior information, the diameter of optic disc in a standard retinal image, connected co...

PURPOSE To evaluate which optic disc parameters are predictive factors for the development of disc hemorrhages in chronic open-angle glaucoma. METHODS The prospective comparative clinical observational study included 432 eyes of 281 white patients with chronic open-angle glaucoma. Mean follow-up time was 38.8 months (median, 31.5). Eyes in the whole study group were divided into those with an...

To recognize and to assess glaucomatous changes at the optic nerve, it is important to know the characteristics of the normal optic disc. As in the other biological variables, the appearance of the optic disc varies widely among healthy individuals. This fact is complicate the recognition of the pathological changes. ‘Optic Disc’ is frequently used to describe the portion of the optic nerve cli...

Retinal image analysis is done through different diagnosis methods in this modern Ophthalmology .Many novel methods are present to segment blood vessels and optic disc in the fundus retinal images. This methods are used for non-intrusive diagnosis since in the modern ophthalmology ,morphology of blood vessel and optic disc is an important indicator for some of the diseases like diabetic retinop...

Pseudopapilledema is used for pathologies that mimicking the optic disc edema. Among these, pseudo papilledema is commonly produced by optic disc drusen (ODD). A 17-year-old female patient was referred to the ophthalmology department from child neurology department with papilledema diagnosis because of bilateral elevated and blurred optic disc. Following ophthalmologic evaluation with fundus ex...