Among all glaucoma suspects, eyes with optic nerve head features suspicious or suggestive of early glaucoma are probably those that offer the greatest challenge for clinicians. In contrast with the robust longitudinal data published on ocular hypertension, there is no specific management guideline for these patients. Therefore, evaluating eyes with suspicious optic disc appearance and normal in...

PURPOSE Acetazolamide was previously shown to increase optic disc partial pressure of oxygen (PO(2)). The study was conducted to evaluate optic disc PO(2) variations during normoxia, hyperoxia (100% O(2)), and carbogen breathing (95% O(2), 5% CO(2)), before and after intravenous administration of acetazolamide. METHODS PO(2) measurements were obtained at intervascular areas of the optic disc ...

This research was aimed to study the etiology of optic atrophy and comparison of optic disc morphology between compressive and glaucomatous optic atrophy. It included 72 cases of optic atrophy admitted in Maharani Laxmi Bai Medical College, Jhansi between January 2016 to May 2017. Assessment of present complaints, examination of the eyes, visual acuity, refraction, perimetry, Optical Coherence ...

OBJECTIVE To determine the prevalence of tilted and torted optic discs and associated risk factors among Chinese adults in Singapore. METHODS As part of a population-based survey, optic disc stereophotographs of both eyes were obtained, and left eyes were analyzed using imaging software. A tilted optic disc was defined as an index of tilt (ratio of minimum to maximum optic disc diameter) less...

Optic disc (OD) and fovea locations are two important anatomical landmarks in automated analysis of retinal disease in color fundus photographs. This paper presents a new, fast, fully automatic optic disc and fovea localization algorithm developed for diabetic retinopathy (DR) screening. The optic disc localization methodology comprises of two steps. First, the OD location is identified using t...

PURPOSE Optic nerve head (ONH) assessment and its interpretation in healthy patients and those with glaucoma remains a pivotal topic specifically considering rapid advancements in imaging technologies. We undertook a large-scale, mixed cohort, comparative study to assess the correlation of optic disc measurements between different imaging modalities and investigated the impact of patient and di...

PURPOSE Visual field defects and changes in the optic nerve head are signs of glaucoma. It has been shown that blue-on-yellow (B-Y) perimetry can reveal visual field defects earlier and shows them larger than does white-on-white (W-W) perimetry. The Heidelberg retina tomograph (HRT) can produce three-dimensional images of the optic disc. The aim of this study was to find out how B-Y perimetry r...

AIMS To find out whether the size of the blind spot area, determined by static perimetry, depends on the surface topography of the optic disc and its surrounding area. METHODS Ten eyes were examined; all had a parapapillary atrophy adjacent to the temporal side of the disc. Microperimetry was performed under direct fundus control using a Rodenstock scanning laser ophthalmoscope. The horizonta...

PURPOSE To investigate optic disc perfusion differences in normal, primary open-angle glaucoma (POAG), and normal tension glaucoma (NTG) eyes using optical microangiography (OMAG) based optical coherence tomography (OCT) angiography technique. DESIGN Cross-sectional, observational study. SUBJECTS Twenty-eight normal, 30 POAG, and 31 NTG subjects. METHODS One eye from each subject was scan...

Purpose To report longitudinal changes over time after surgery in the topography of the optic disc, thickness of the circum papillary retinal nerve fiber layer (c-RNFL), and thickness of the macular ganglion cell complex (m-GCC) in a case of juvenile open angle glaucoma. Observations Case report based on one patient. After significant edema of the optic disc for 2 months, the cup depth and cu...