ANTERIOR ISCHEMIC OPTIC NEUROPATHY (AION) Perioperative Arteritic Anterior Ischemic Optic Neuropathy (AAION) Hypotension Nonarteritic Anterior Ischemic Optic Neuropathy (NAION) RADIATION OPTIC NEUROPATHY POSTERIOR ISCHEMIC OPTIC NEUROPATHY ISCHEMIC OPTIC DISC EDEMA WITH MINIMAL ISCHEMIC OPTIC NEUROPATHY IN SETTINGS OF DYSFUNCTION HEMODYNAMIC COMPROMISE Pre-AION Optic Disc Edema Spontaneous or T...

BACKGROUND Recent reports indicate that eyes with normal pressure glaucoma have larger optic discs than eyes with primary open angle glaucoma or normal eyes. This study was performed to find whether, in normal pressure glaucoma, a large disc is associated with more optic nerve damage than a small disc. METHODS Colour optic disc photographs of 74 patients with normal pressure glaucoma were ass...

We cross-sectionally examined the relationship between age, optic disc area, refraction, and gender and optic disc topography and retinal nerve fiber layer (RNFL) measurements, using optical imaging techniques. One eye from each of 155 Caucasian subjects (age range 23.0-80.8 y) without ocular pathology was included. Measurements were obtained by using the Heidelberg Retina Tomography (HRT), the...

Presented are the methods proposed by authors to identify and model the optic disc in colour retinal images. The first three our approaches localized the optic disc in two steps: a) in the green component of RGB image the optic disc area is detected based on texture indicators and pixel intensity variance analysis; b) on the segmented area the optic disc edges are extracted and the resulted bou...

Purpose The purpose of this study was to investigate the role of optic disc torsion on the rate of progressive retinal nerve fiber layer (RNFL) thinning in patients with myopic open-angle glaucoma. Methods We included 102 patients with myopic open-angle glaucoma accompanied by glaucomatous damage confined to a single hemiretina who were followed up over a 5-year period. We divided the subject...

PURPOSE To investigate the effect of optic disc center displacement on retinal nerve fiber layer (RNFL) measurement determined by spectral domain optical coherence tomography (SD-OCT). METHODS The optic disc center was manipulated at 1-pixel intervals in horizontal, vertical, and diagonal directions. According to the manipulated optic disc center location, the RNFL thickness data were resampl...

PURPOSE To determine whether nonglaucomatous optic disc cupping in children violates the ISNT rule (which states that for normal optic discs the neuroretinal rim width is greatest in the order inferior >or= superior >or= nasal >or= temporal). METHODS Digital ocular fundus photographs from a random cohort of children with large optic disc cups of nonglaucomatous origin were analyzed in masked ...

Optic disc pits are an uncommon congenital abnormality. Patients remain asymptomatic unless they develop maculopathy. We present a rare case of a double optic disc pit of which only three others have been reported worldwide. A 51-year-old gentleman presented with blurred vision. Fundoscopy revealed a right double optic disc pit. Though he was symptomatic there was no evidence of maculopathy. OC...

T he correct evaluation of the optic disc, and related structures in ophthalmoscopy, is critical for the diagnosis of open angle glaucoma because usually glaucomatous optic nerve damage firstly occurs in the optic disc before detectable visual field defects become apparent; however, some studies have demonstrated that visual field defects can also be found without any glaucomatous changes in th...

PURPOSE To evaluate optic disc pallor using ImageJ in traumatic optic neuropathy (TON). METHODS This study examined unilateral TON patients. The optic disc was divided into 4 quadrants (temporal, superior, nasal, and inferior), consistent with the quadrants on optical coherence tomography (OCT) retinal nerve fiber layer (RNFL) thickness maps. Optic disc photography was performed and disc pall...