This article reports a case of possible involvement of membrane tissue on the optic disc with macular schisis formation associated with glaucomatous optic disc without optic disc pits. A 78-year-old man presented with loss of central visual acuity of the left eye. He had a medical history of primary open-angle glaucoma. Visual acuity was 0.6 in his left eye, and funduscopy revealed macular schi...

OBJECTIVE Estimation of the error rate in the subjective determination of the optic nerve head edge and area. METHOD 1) 169 images of optic nerve disc were evaluated by five experts for the defining of the edges in 8 positions (every 45°). 2) The estimated areas of 26 cases were compared with the measurements of the Cirrus Optical Coherence Tomography (OCT-Cirrus). RESULTS 1) The mean varia...

BACKGROUND Very little documentation of spontaneous regression of an angiomatous retinal lesion in v. Hippel-Lindau disease (VHL) exists. It is commonly believed that a spontaneous change of hemangiomas into fibrotic lesions occurred. PATIENTS/METHODS Follow-up examinations of four patients with VHL in the Freiburg VHL study were carried out. RESULTS A 16-year-old girl revealed a vascular l...

BACKGROUND Little information is available on metastatic tumors to the optic disc. OBJECTIVE To determine the clinical features and prognosis of patients with optic disc metastasis. DESIGN Retrospective chart review. RESULTS Of 660 consecutively evaluated patients with intraocular metastasis, 30 (4.5%) (31 eyes) had metastatic cancer to the optic disc; 24 (80%) were women and 6 (20%) were...

purpose: to determine the effect of induced myopia and hyperopia using soft contact lenses on optic disc parameters measured by fourier domain optical coherence tomography (fd-oct) in emmetropic persons. methods: in a quasi-experimental self controlled study, 57 normal emmetropic participants 18-42 years of age were studied. each subject underwent a complete ophthalmic examinations including me...

The Glaucoma Stereo Analysis Study (GSAS) is a multicenter collaborative study of the characteristics of glaucomatous optic disc morphology using a stereo fundus camera. Using GSAS dataset, the formulas for predicting different glaucomatous optic disc appearances were established. The GSAS dataset containing three-dimensionally-analyzed optic disc topographic parameters from 187 eyes with prima...

Optic disc detection is important in the computer-aided analysis of retinal images. It is crucial for the precise identification of the macula to enable successful grading of macular pathology such as diabetic maculopathy. However, the extreme variation of intensity features within the optic disc and intensity variations close to the optic disc boundary presents a major obstacle in automated op...

Glaucoma is a chronic eye disease that leads to blindness. This disease cannot be cured but we can detect the disease in time. Current tests using intraocular pressure (IOP) measurement are not sensitive enough for population based glaucoma screening. Optic nerve head assessment in retinal fundus images is more promising and superior than current methods. This paper proposes segmentation of opt...

Bilateral optic disc edema in a diabetic patient may be caused by diabetic papillopathy. We herein report on a patient with bilateral optic disc drusen simulating diabetic papillopathy. A 55-year-old patient with type 2 diabetes presented with decreased vision of 1-month. Diabetic papillopathy was initially considered as there was disc edema in both eyes with focal hemorrhages at the disc margi...

It has been demonstrated that shape, area and depth of the optic disc are relevant indices of diabetic retinopathy. In this paper, we present a new fundus optic disc localization and segmentation method based on phase congruency (PC). Firstly, in order to highlight the optic disc, channel images with the highest contrast between optic disc and background are selected in LAB, YUV, YIQ and HSV sp...