نتایج جستجو برای: optic nerve head

تعداد نتایج: 353125  

2012
Stephan Kremmer Marcus Keienburg Gerasimos Anastassiou Maurice Schallenberg Klaus-Peter Steuhl J. Michael Selbach

PURPOSE To compare the performance of scanning laser topography (SLT) and scanning laser polarimetry (SLP) on the rim of the optic nerve head and its surrounding area and thereby to evaluate whether these imaging technologies are influenced by other factors beyond the thickness of the retinal nerve fiber layer (RNFL). MATERIALS AND METHODOLOGY A total of 154 eyes from 5 different groups were ...

Journal: :iranian journal of child neurology 0
z. razavi md,assistant professor, pediatric endocrinologist, hamedan university of medical sciences

objective the diagnosis of de morsier syndrome or septo-optic dysplasia is made on the basis of the diagnosis of optic nerve hypoplasia. septo-optic dysplasia is defined by a variable combination of dysgenesis of midline brain structures including optic nerve hypoplasia and hypothalamic-pituitary dysfunction often associated with a wide variety of brain malformations of cortical development. th...

Journal: :The British journal of ophthalmology 2002
J B Jonas W M Budde

BACKGROUND/AIM Since the central retinal vessel trunk usually located in the nasal optic disc sector can render difficult the delineation of the neuroretinal rim and optic disc, the aim of this study was to evaluate whether the nasal region of the optic nerve head is important, or can be left out, for the morphometric glaucoma diagnosis. METHODS The clinical observational study included 1337 ...

صالحیان نیک , الهام , تفاخری, زهرا, شریفی رضوی , آتنا, فدایی, سحر , فروغی پور , محسن, مقدم احمدی, امیر, پور رشیدی, احمد,

Background and purpose: Optic neuritis is one of the common causes of unilateral or bilateral visual loss. The most common cause of this disorder is demyelinating disease of the central nervous system (CNS) and most of the patients with optic neuritis will present other signs of multiple sclerosis (MS). The diagnosis depends on the clinical findings, however, magnetic resonance imaging (MRI) is...

Journal: :Investigative ophthalmology & visual science 2012
Kanwarpal Singh Carolyne Dion Antoine G Godin Faezeh Lorghaba Denise Descovich Marcelo Wajszilber Tsuneyuki Ozaki Santiago Costantino Mark R Lesk

PURPOSE To measure the pulsatile movement of neuroretinal tissue at the optic nerve head synchronous with the cardiac cycle. METHODS We used a noninvasive imaging device based on Fourier domain low-coherence interferometry to measure the pulsatile movements of the optic nerve head, peripapillary retina, and cornea with submicron accuracy along a line across the fundus. We also measured the ch...

Journal: :Archives of ophthalmology 1985
J R Samples M van Buskirk W T Shults H J Van Dyk

The simultaneous occurrence of both optic nerve head drusen and glaucoma may make it difficult to evaluate visual field defects and the appearance of the optic nerve head. We saw five patients with both conditions, of whom four had pigmentary glaucoma or pigmentary dispersion syndrome. Drusen do not preclude the development of cupping, and they make it difficult to interpret its significance. M...

Journal: :Vision Research 2001
Donald C Hood Marcus A Bearse Erich E Sutter Suresh Viswanathan Laura J Frishman

To search for an optic nerve head component (ONHC) in the monkey's (Macaca mulatta) multifocal electroretinogram (mERG), mERGs from three animals were recorded with different electrode configurations. A component with a latency that varied with distance from the optic nerve head was easily identified by eye in recordings from the speculum of a Burian-Allen electrode referenced to a DTL on the u...

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