2024年7月23日 · The optic nerve. This is like the data cable that connects your retina to your brain. Many eye conditions can affect the part of this nerve that attaches to the back of your eye. The choroid. This layer is just underneath your retina. It’s part of the uvea, the middle layer of your eye’s outer wall.

Each fundus has no sign of disease or pathology. The gaze is into the camera, so in each picture the macula is in the center of the image, and the optic disc is located towards the nose. Both optic discs have some pigmentation at the perimeter of the lateral side, which is …

2023年2月2日 · Learn how optometrists can identify, diagnose, and treat optic disc abnormalities. Download the cheat sheet with clinical photographs and disease breakdowns.

This article provides a comprehensive, systematic approach to interpreting color fundus photographs, correlating observed features with underlying pathophysiology. It covers the normal appearance of key fundus structures, including the optic disc, macula, fovea, retinal vessels, retinal pigment epithelium, choroid, and vitreous.

The optic disc appears pink with sharp margins and a cup-to-disc ratio of approximately 0.35. The vasculature is normal in course and caliber. The striated sheen radiating outward from the disc is evidence of a healthy retinal nerve fiber layer.

We propose a method using Gabor filters and phase portraits to automatically locate the optic nerve head (ONH) in fundus images of the retina.

Near mid-disk, the central retinal artery and vein emerge from the optic nerve, with which they have run forward into the orbit. Each soon bifurcates into superior and inferior branches, which run "flat," that is, parallel with the retinal surface.

2015年9月15日 · With its relative ease of use, noninvasive technique and ability to aid in the diagnosis and management of a variety of retinal disorders, fundus autofluorescence (FAF) has increasingly become a mainstream imaging modality.

Fundus photographs are often included in ophthalmological papers and presentations to disseminate knowledge that can be used to formulate a diagnosis in clinical cases. They are also effective images for probing visual perception because they have both salient features such as the optic nerve head and macula, and considerable variation in the ...

2009年2月24日 · Detection of the optic nerve head (ONH) is a key preprocessing component in algorithms for the automatic extraction of the anatomical structures of the retina. We propose a method to automatically locate the ONH in fundus images of the retina.