Exudates are one of the chief signs of diabetic retinopathy, which is a main root of blindness and can be prevented with an early screening process. In this article, authors have attempted to detect exudates using back propagation neural network. The publicly available diabetic retinopathy dataset DIARETDB1 has been used in the evaluation process. To prevent the optic disk from interfering with...

The optic nerve head is that region of the retina where nerve fibres and blood vessels pass through the sclera. It is sensitive to changes associated with glaucoma that can occur without other symptoms. Diabetes can also be the cause of changes in the appearance of the retina. The changes from the normal appearance can be diagnostic of the diseases, tracking of the changes in sequential images ...

Optic disk detection on retina image has become one of many initial steps in evaluation Diabetic Macular Edema (DME) severity. As much as early the step is, result is extremely essential. This article discusses optic based color histogram value. The done by using value which taken from window sliding process with size 50x50 pixels. First, candidates disc were detected Extreme Learning Machine t...

Glaucoma disproportionately affects individual of African ancestry. Additionally, racial differences in the optic nerve head have been well described that may alter the vulnerability to intraocular pressure related injury and, in addition, alter the clinical ability to detect the presence of early optic nerve injury. This paper will review the literature describing racial differences in the opt...

The pattern electroretinogram obtained in patients affected by multiple sclerosis were compared with those in a normal population. The pattern electroretinogram amplitude in multiple sclerosis optic neuritis frequently appeared normal, but pattern electroretinogram amplitude abnormalities were found in patients suffering from recurrent multiple sclerosis optic neuritis. Pattern electroretinogra...

From The Wilmer Institute, W. K. Kellogg Foundation Laboratories, The Johns Hopkins University School of Medicine, Baltimore, Md. This investigation was conducted under a Post-Doctoral Research Fellowship supported by a Bob Hope-Fight For Sight Award of the National Council to Combat Blindness, Inc., New York, N. Y. Submitted for publication Nov. 30, 1976. Reprint requests: Dr. Roger C. Wales, ...

We introduce here a new technique for segmenting optic cup using two-dimensional fundus images. Cup segmentation is the most challenging part of image processing of the optic nerve head due to the complexity of its structure. Using the blood vessels to segment the cup is important. Here, we report on blood vessel extraction using first a top-hat transform and Otsu's segmentation function to det...

Self-movement through an environment generates optic flow, a potential source of heading information. But it is not certain that optic flow is sufficient to support navigation, particularly navigation along complex, multi-legged paths. To address this question, we studied human participants who navigated synthetic environments with and without salient optic flow. Participants used a keyboard to...

In this paper, we propose a superpixel classification based optic cup segmentation for glaucoma detection. In the proposed method, each optic disc image is first over-segmented into superpixels. Then mean intensities, center surround statistics and the location features are extracted from each superpixel to classify it as cup or non-cup. The proposed method has been evaluated in one database of...