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Optic disc

Optic Disc - an overview ScienceDirect Topic

4.3 Optic disc (or ONH), macula and fovea: Detection and segmentation. The optic disc (OD), also termed as optic nerve head (ONH), is the point where the retinal vessels originate. OD carries much vital information related to glaucoma and proliferative diabetic retinopathy (PDR) In computing and optical disc recording technologies, an optical disc (OD) is a flat, usually circular disc that encodes binary data in the form of pits and lands (where a change from pit to land or from land to pit corresponds to a binary value of 1; while no change, regardless of whether in a land or a pit area, corresponds to a binary value of 0) on a special material (often aluminum) on one of its flat surfaces The optic disc represents the anterior end of the optic nerve, the most forward extension of the central nervous system (CNS). The optic disc gives a rare glimpse into the CNS. Hence, diseases of the CNS are often manifested on fundus examination. Abnormalities of the optic disc may reflect eye dise Optic-disc.org is an educational resource for health care professionals who are required to examine the optic nerve. Optic nerve assessment and evaluation can be a complex task, but it is hoped that this website helps by way of a comprehensive image library and a series of useful tutorials The optic disc is a vertically oval spot in the back of the eye about three to four millimeters (0.14 to 0.18 inch) nasal to the center. It is made up of the nerve fibers of nerve cells, called ganglion cells, that reside within the light-sensitive layer of the back of the eye, called the retina

Optical disc - Wikipedi

  1. The optic-disc exam can sometimes be quite challenging because of difficulties in identifying the limits of the optic-nerve border (i.e., scleral ring). In some situations, I have found it helpful to use the green light beam on the slit lamp, since it may provide a clearer view of the scleral rim
  2. First described in the late 19th century by Wiethe, optic disc pits (ODPs) are anomalous cavitations of the optic nerve. 1 ODPs are rare, and they can be congenital or acquired. Although cases of bilateral ODPs have been reported, ODPs typi­cally present unilaterally. ODPs tend to be solitary, but two or three pits occur­ring together have also.
  3. An optical disk is any computer disk that uses optical storage techniques and technology to read and write data. It is a computer storage disk that stores data digitally and uses laser beams (transmitted from a laser head mounted on an optical disk drive) to read and write data
  4. Congenital Optic Disc Anomalies. Funny-looking optic discs are a fun diversion in an ophthalmology clinic (sarcasm implied here). What was initially a routine exam immediately turns into an agonizing is this normal or not exercise. Part of the angst that comes from seeing anomalous optic discs is that some of the congenital disc anomalies.
  5. optic disc. The small circular area at the back of the eye at which all the nerve fibres from the retina come together to form the optic nerve. Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
  6. Glaucomatous optic disc. In glaucoma, the optic nerve gets damaged. A portion of the optic nerve may be assessed during the eye exam, where it can be seen as a round structure (optic disc), with the pink or reddish section representing the neural tissue that takes the visual information to the brain. The whitish central part represents absence of.
  7. ation reveals an enlarged optic disc with a sharply demarcated, glistening white, bowl-shaped deep excavation

The axons of the optic nerve are bundled and insert in the back of the eye, and this optic disc is seen in the back of the eye along with blood vessels. In optic nerve degeneration related to glaucoma, the optic disc displays changes that are characteristic of glaucoma, which your doctor may refer to as cupping. These deposits can be considered small tumors that develop within the optic nerve head, and may lead to an elevated disc (and therefore this condition is sometimes referred to as pseudopapilledema). They can be associated with retinitis pigmentosa, angioid streaks, Usher syndrome, Noonan syndrome and Alagille syndrome.[3] They also may lead to a loss of visual field or, in rare cases, central acuity or anterior ischemic optic neuropathy[5]

Optic disc thinning and cupping. Optic disc thinning refers to examining the neuroretinal rim (NRR) and observing abnormal measures of the inferior, superior, nasal and temporal rims. 2 In order to evaluate the NRR, the ISNT rule can be helpful for remembering the order of thickest to thinnest rims in a healthy disc: I: Inferior rim, thickes The important optic disc abnormalities are: papilloedema, papillitis and optic atrophy. Papilloedema - swelling of the optic disc with blurring of the disc margins, hyperaemia and loss of physiologic cupping. Flame-shaped hemorrhages and yellow exudates appear near the disc margins as edema progresses. There is loss of spontaneous venous pulsations. Examination of the optic nerve head for potential glaucoma or other pathology is one of the very fundamental skills that all optometrists require, and so hopefully this refresher will be useful. In order to examine a disc in detail I try to follow these steps. Please note that this is always with a volk lens at the slit-lamp, with dilation when. Optic disc evaluation. PowerPoint Glaucoma

Abnormalities of the optic disc - PubMe

Optic disc edema refers to the ophthalmoscopic swelling of the optic disc with a concurrent increase in fluid within or surrounding the axons. While unilateral disc edema is more common, bilateral disc edema can occur. Many terms have been used to describe optic disc edema including swollen optic disc, disc edema, papilledema, papillitis, choked disc, and elevated optic nerve The optic disc is the area where specific nerve fibres exit the retina to form the optic nerve. It is also where blood vessels enter the eye. The optic disc is usually round or oval in shape and is made up of two main parts: the outer rim and the cup About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators. The optic disc (optic nerve head) is the location where ganglion cell axons exit the eye to form the optic nerve. There are no light sensitive rods or cones to respond to a light stimulus at this point. This causes a break in the visual field called the blind spot or the physiological blind spot Optic nerve cupping progresses as the cup becomes larger in comparison to the optic disc. Both people with and without optic nerve damage have optic nerve cupping, although those with glaucoma tend to have a greater cup-to-disc ratio. A cup to disc ratio greater than six-tenths is generally considered to be suspicious for glaucoma

The Optic Dis

  1. A swollen optic disc can threaten your vision. Sometimes it's also a sign of a serious medical problem. Find out what causes it and what you can do about it
  2. Differentiating between true optic disc swelling and pseudo-optic disc swelling is important for avoiding unnecessary testing, Dr. Bhatti said. While papilledema is disc edema secondary to increased intracranial pressure, pseudopapilledema is a benign condition that is often due to optic disc drusen. Critical finding
  3. When you look at the retina with an ophthalmoscope what can you see? Let's identify the optic disc, macula and fovea and talk about those parts of the fundus..
  4. Optical Disc Drive Description. An optical drive that's meant to be installed inside the computer. Asus. An optical drive is a piece of computer hardware about the size of a thick softcover book. The front has a small Open/Close button that ejects and retracts the drive bay door. This is how media like CDs, DVDs, and BDs are inserted into and.
  5. Optic disc drusen (ODD) are acellular deposits located in the optic nerve head of up to 2.4% of the population. They may develop as by-products of impaired axonal metabolism in genetically predisposed individuals, in whom a narrow scleral canal is hypothesized to play a role. Although ODD are often
  6. With OCT, disc drusen are revealed with a lumpy, bumpy internal contour, whereas true optic disc edema is recorded with a smooth internal contour. 14,15 Our patient's OCT revealed a smooth internal contour consistent with true disc edema (Figures 4a and 4b). Other causes of pseudopapilledema include tilted optic disc, myelinated nerve fibers, congenitally crowded discs and optic nerve hypoplasia
  7. ed. The disc should be round or slightly oval with the long axis usually vertical and with sharp borders. The nasal border is normally slightly blurred. The disc is pinkish in light-skinned.

Optical disc. Updated: 04/12/2021 by Computer Hope. Alternatively referred to as a disc drive, optical media, optical storage, Optical disc drive, and optical disk, an optical disc is any media read using a laser assembly. The most common types of optical media are Blu-ray, CDs, and DVDs. Computers can read and write to CDs and DVDs using a CD. Optic disc edema results from compression, infection, infiltration, inflammation, demyelinating disease or reduced perfusion to the nerve. These conditions slow normal axoplasmic flow, resulting in an accumulation of intracellular fluids within the ONH. Papilledema is a specific case of optic disc edema secondary to ICP Normal optic disc, whose temporal portion is whiter than its nasal portion. Optic disc of myopic patients, whose temporal portion is even whiter than in non-myopic patients. Distinguishing pathologic optic pallor from normal variation and myopic optic discs is very challenging and best left to ophthalmologist optic disc vasculature that may make it more susceptible to the effects of disrupted hemodynamics, or mechanical displacement of the prelaminar vasculature by the calcified fixed drusen. Figure 3.7 Peripapillary subretinal hemorrhage (arrow) in a patient with buried drusen Macula and Optic Disc. The following is a fundus photograph from a normal eye showing the macula (green circle) and fovea (black circle). The macula is a circular area of diameter 5.5 mm with a center located 17 degrees, or 4.0-5.0 mm, temporal, and 0.53 - 0.8mm inferior to the center of the optic disc

EPOS™ - C-0782

What is the Optic Disc? (with pictures) - wiseGEE

Pseudopapilledema. Pseudopapilledema (or pseudodisc edema) is the term used to describe optic nerve variants or abnormalities that mimic papilledema ophthalmoscopically, including congenital anomalies, tilting, hypoplasia, crowded hyperopic disc, optic disc hamartoma, myelinated nerve fibers, and optic nerve head drusen ( Figs. 6.2 and 6.3).Visual loss, which may occur in some cases, is long. The Optic Disc Assessment Project found that differentiating glaucoma from genetic optic neuropathies based on disc assessment alone is difficult, concluding that a careful history and clinical examination are required for accurate diagnosis . Differentiating glaucomatous from nonglaucomatous optic disc cupping is the focus of this review Signs and symptoms of optic neuritis can be the first indication of multiple sclerosis (MS), or they can occur later in the course of MS.MS is a disease that causes inflammation and damage to nerves in your brain as well as the optic nerve.. Besides MS, optic nerve inflammation can occur with other conditions, including infections or immune diseases, such as lupus

Optic Disc Drusen Causes. The optic nerve is a cable tube connection that transmits images from the retina to the brain. It includes over one million retinal ganglion cell axons. The optic nerve head, or optic disc is the anterior end of the nerve that remains in the eye and for this reason shows up with an ophthalmoscope Disc Drusen Associated CNVM - After Laser Treatment Papilledema and Pseudopapilledema Summary • In both cases the optic disc is elevated • In papilledema the nerve is elevated because it is swollen, or edematous because of increased intracranial pressure • However, not every swollen or edematous optic nerve is the result of increased intracranial pressur The optic disc is the round spot on the retina formed by the passage of the axons of the retinal ganglion cells, which transfer signals from the photoreceptors of the eye to the optic nerve. Optic disc stereophtographs are as accurate in detecting glaucoma as the other imaging modalities. Retinal nerve fiber analysis with all the above modalities exhibit a characteristic double hump because the RNFL in thicker in the superotemporal and inferotemporal sectors compared to the nasal and temporal ones

How to Evaluate the Suspicious Optic Dis

• Optic disc colobomas appear as sharply defined, white, bowl-shaped, inferiorly decentered excavations. Rarely is the entire disc affected. They can occur either unilaterally or bilaterally, with equal frequency. 1 : 2, 3. Optic nerve head drusen located at approximately 12 o'clock, with a highlighted appearance on fundus autofluorescence. Optic Disc Drusen. Optic disc drusen might increase the risk of developing NAION by theoretically contributing to the crowded optic nerve in discs with small cup to disc ratios. There are anecdotal reports of NAION occurring in patients with optic disc drusen but a causal relationship has not been proved . Risk Factor Characteristics of the normal ONH. The ONH or optic disc is a round/oval 'plug-hole', down which more than a million nerve fibres descend through a sieve-like sheet known as the lamina cribrosa.These fibres are then bundled together behind the eye as the optic nerve which continues towards the brain.. The retinal nerve fibres are spread unevenly across the surface of the retina in a thin. Optic disc drusen may be associated with progressive visual field loss, more rarely loss of central acuity, and, in very rare cases, blindness. However, congenital causes are not associated with any progressive visual loss. Disc drusen are more common in whites and are believed to be less common in African Americans

Optic Disc Pit Round or oval, gray or white depression in the optic disc Commonly found temporally 69. Optic Disc Drusen Globules of mucoproteins & mucopolysaccharides that progressively calsify in the optic disc Thought to be the remnants of the axonal transport system of degenerated retinal ganglion cells 70 Polymorphism rs7916697 in ATOH7 was reported to be an important genetic determinant of optic disc size in a meta-analysis consisting of UK and Australian cohort (p=1.3x[10.sup.-10]) that explained 1.7% variation in the optic disc area in the UK cohort [6], implicating its pathophysiological role in POAG Objectives: To investigate the effect of optic disc size on correlation between Bruch's membrane opening-minimum rim width (BMO-MRW) and peripapillary retinal nerve fibre layer (RNFL) thickness from three scan circles. Methods: In this retrospective, observational study, non-glaucomatous eyes without visible RNFL defect or visual field loss were included The optic disk represents the beginning of the optic nerve (second cranial nerve) and the point where axons from over one million retinal ganglion cells coalesce. Clinical evaluation of the optic nerve head is critical in the diagnosis and monitoring of glaucoma and other optic neuropathies that may lead to vision loss Mentions. Differential diagnosis of optic disc oedema usually includes intracranial tumours, benign intracranial hypertension, hydrocephalus and optic neuritis due to demyelinating, and viral, infectious, and idiopathic causes. However, it can also appear in ischemic optic neuropathy, neoplasmatic infiltration, sarcoidosis, syphilis, and.

Diagnosis and Management of Optic Disc Pits - American

Optic Disc Swelling and Papilledema. The optic disc is a non-sensory spot in the retina where the axons of the ganglion cells carrying afferent light-induced impulses to the visual cortex of the. Optic disc drusen (ODD) are rounded, calcified, concentrically laminated hyaline deposits situated in the prelaminar tissue of the optic nerve. Though they are predominantly dense nuggets of calcium phosphate, Ca 3 (PO 4) 2, ODD also contain mucopolysaccharides, glycoproteins, amino acids, and nucleic acids ( 1 - 3 ) Disc edema is an ophthalmoscopic finding defined by unilateral or bilateral swelling of the optic disc. There are several synonyms used to describe this finding including papillitis, papilledema, swollen or choked discs, and the most commonly used term - optic disc edema (ODE) Optic disk photograph and multicolor showing a deeply pigmented lesion in the optic nerve head with adjacent choroid and retinal involvement. De Alba MA, Villegas VM, Gold AS, et al. Clinical findings and genetic expression profiling of three pigmented lesions of the optic nerve Optic disc area was not significantly associated with risk of conversion (HR: 0.84 for 0.1 mm 2 larger; 95% CI: 0.58 -1.2). In a multivariate model adjusting for other known risk factors, such.

A Sign of Active Progression. By Jin-Soo Kim, MD; and Young Kook Kim, MD . The association of optic disc hemorrhage (ODH) with glaucoma was first recognized more than 100 years ago by Jannik P. Bjerrum, who called it glaucoma haemorrhagicum.The phenomenon was subsequently overlooked until the 1970s, when Stephen M. Drance, MD, revisited the issue in his study on splinter hemorrhages in open. pathological optic discs from elevated non-pathological optic discs. Key Words: optic nerve head, papilledema, elevated optic disc, differential diagnosis, optical coherence tomography Background One of the challenges facing the ophthalmic care provider in clinical practice is the presentation of an elevated optic nerve head (ONH) Optic disc drusen were visible on the nasal portion of the optic disc (Figure, B) in the left eye on fundus photography and both eyes with fundus autofluorescence and enhanced-depth imaging-optical coherence tomography. Enhanced-depth imaging-optical coherence tomography of the optic disc also demonstrated peripapillary hyperreflective. Optic disc size, color, and shape The optic disc is the ophthalmoscopically visible part of the ONH. The boundaries of the optic disc conform to the edges of the scleral canal, which appears as a whitish circular band. In the other words, the size of the scleral canal determines the optic disc size. Eyes with small scleral canals have small.

What is an Optical Disk? - Definition from Techopedi

Normal optic nerve head. 8. I>S>N>T. 9. Features that should raise suspicion that glaucomatous damage has already occurred include: 1. notching of the rim 2. hemorrhage crossing the rim 3. undercutting of rim 4. asymmetry of rim width between eyes in absence of asymmetry of disc size 5. an abnormally thin rim in one or two sectors The optic disc (OD) is formed by the aggregation of retinal nerve fibers, which is light yellow in color and ellipse in shape. The optic cup (OC) is a cup-like area in the center of OD with variable sizes. The vertical cup-to-disc ratio (CDR) plays an important role in the diagnosis and classification of glaucoma [6, 7]

Classification Network Preprocessing. The pixel level segmentation of the optic disk and optic cup was utilized to generate images of dimension (550, 550) centered around the optic disk. 6 different images were generated by varying parameters such as clip value & window level while performing CLAHE Optic disc pit (ODP) is a rare congenital abnormality of the optic nerve head, first described by Wiethe in 1882. 1 ODP usually appears as a grayish-whitish, round or oval depression of the optic disc (Figure 1A), and it may have different levels of severity. It is a spectrum of congenital cavitary anomalies of the optic disc, ranging from the more common optic pit to the so-called morning. The image analysis system 1 comprises an image analysis computer 2 accurately determining a cup line, providing an ophthalmologist or the like with the accurate value of the ratio of an optic disc cupping/an optic nerve head and supporting the diagnosis of ophthalmologic lesions such as glaucoma. 例文帳に追加. 画像解析システム1は、カップラインを精度良く決定し. Synonyms for optic disc in Free Thesaurus. Antonyms for optic disc. 2 synonyms for optic disc: optic disk, blind spot. What are synonyms for optic disc

Congenital Optic Disc Anomalies — Ophthalmology Revie

optic disc ( plural optic discs ) ( anatomy) The location where ganglion cell axons exit the eye to form the optic nerve Thinning of optic disc neuroretinal rim so that optic disc appears pathologically cupped (excavated) Usual cause is glaucoma. Glaucoma causes slow death of optic nerve axons and their supporting glia partly because of chronically high intraocular pressure. Visual fields eventually become constricted, but only when neuroretinal rim is very thinned frontonasal dysplasia; optic disc; encephalocele; Frontonasal dysplasia was a term suggested by Sedano et al 1 in 1970 to describe a group of patients with midline facial clefting. It has a wide clinical spectrum in which there may be marked hypertelorism, primary telecanthus, a broad nasal tip which is frequently cleft, median cleft upper lip and premaxilla, median cleft palate, anterior or.

Optic disc drusen masquerading as papilloedema | Archives

Optic disc definition of optic disc by Medical dictionar

The optic disc or nerve head is the point where the axons from the retinal ganglion cells leave the eye. The nerve head appears as a white circular structure in the back of the eye. There are no photoreceptors on this structure. As a result, humans have a natural blind spot.. Optic disc drusen is characterized as abnormal deposits of protein-like material within the optic nerve head. Over time these deposits calcify in the optic disc and may affect peripheral vision. Common symptoms reported by people with optic disc drusen. Common symptoms. How bad it is Glaucoma is the second leading cause of loss of vision in the world. Examining the head of optic nerve (cup-to-disc ratio) is very important for diagnosing glaucoma and for patient monitoring after diagnosis. Images of optic disc and optic cup are acquired by fundus camera as well as Optical Coherence Tomography. The optic disc and optic cup segmentation techniques are used to isolate the. Optic disc drusen (ODD)-associated complications with severe visual loss, most often due to anterior ischaemic optic neuropathy, are also known to occur. There are no treatments available to prevent or ameliorate the vision loss caused by ODD. In children, the ODD are usually uncalcified and buried within the optic nerve head tissue

Severe Vision Loss With Optic Disc Neovascularization

^شحوب القرص البصري. تصنيف COMS. Webeye.ophth.uiowa.edu. 2006-06-27.تم الاسترجاع 2012-02-15. ^ الفصل 4 - ضغط العصب البصري: الأوعية الدموية - تمدد الأوعية الدموية في الشريان العيني.Oph.ucsd.edu. مؤرشف من الأصلي في 2012-07-12.تم الاسترجاع 2012-02-15 Optic disc: Formed by axons of ganglion cells that leave the eye to form the optic nerve; Located medially to the fovea centralis; Insensitive to light due to lack of photoreceptors (physiologic scotoma, i.e, blind spot) Contains the optic cup. Central, cup-like depression in the optic disc; Site of transversing of retinal vessel 视盘(optic disc):全称视神经盘,有时候也被成为视神经乳头(optic nerve head)。在普通的彩色眼底相机中,一般最亮的区域就是视盘的位置。 视盘是眼睛的一个重要组织,很多疾病都可以直接(亦或间接地)通

Glaucoma Information Glaucomatous optic disc Glaucoma

A subset of 100 optic disc images from both methods were further used to validate a grading app for the optic nerves. Data analysis was performed April 7 to April 12, 2015. Main Outcomes and Measures Vertical cup-disc ratio for each test was compared in terms of agreement (Bland-Altman and weighted κ) and test-retest variability Optic disc pallor is commonly seen in clinical practice and its evaluation poses challenges to ophthalmologists. Patients can present with mild visual impairment to total blindness with disc pallor. Disc pallor can be seen incidentally during a routine examination. A systematic approach including a thorough history and comprehensive ocular. optic disk: [ disk ] a circular or rounded flat plate; often spelled disc in names of anatomic structures. articular disk a pad of fibrocartilage or dense fibrous tissue present in some synovial joints. Bowman's disk one of the flat plates making up a striated muscle fiber. choked disk papilledema . ciliary disk pars plana . embryonic disk (.

Optic Disk - an overview ScienceDirect Topic

Abstract. Congenital anomalies of the optic disc underlie many cases of decreased vision, strabismus, and nystagmus in childhood. A comprehensive evaluation necessitates an understanding of the ophthalmoscopic features, associated neuro-ophthalmologic findings, pathogenesis, and appropriate ancillary studies for each anomaly Optic nerve. The optic nerve (CN II) is the second cranial nerve which, along with the olfactory nerve (CN I), is really an extension of the central nervous system. It is not surrounded by Schwann cells with the first sensory bipolar cell body located peripherally in the retina. Their central processes synapse on ganglion cells on the vitreous. Optic disc drusen (ODD) may present a diagnostic dilemma for the clinician, as it may mimic papilledema on fundoscopic exam and result in an invasive work-up for increased intracranial pressure or optic neuropathy. In patients presenting with a new onset headache, CT of the head remains the most commonly performed exam Optic disc definition at Dictionary.com, a free online dictionary with pronunciation, synonyms and translation. Look it up now How is optic nerve damage detected? The normal cup to disc ratio (the diameter of the cup divided by the diameter of the whole nerve head or disc) is about 1/3 or 0.3. There is some normal variation here, with some people having almost no cup (thus having 1/10 or 0.1), and others having 4/5ths or 0.8 as a cup to disc ratio

Optic Nerve Degeneration & Glaucoma BrightFocus Foundatio

  1. Abstract. Optic disc elevation is a reason for neuro-ophthalmologic referral common in children. The nature of the underlying disorder can often be predicted from the wording of the referring physician's telephone call. Bilateral optic disc elevation without visual loss in a child with headaches, nausea, and vomiting of several months.
  2. ing the optic disc margin (called mean height contour at disc margin, or MHCDM) and 36 ten-degree sector measurements of the mean retinal height or mean height contour around a contour of 1.7-mm radius (MHC1.7), with its center at the center of the optic disc were included in the analysis. The contour of 1.7-mm radius was establishe
  3. Bilateral optic disc swelling refers to edema of the optic disc with concurrent increase in fluid within or surrounding the axons. The aetiologies of bilateral optic disc swelling include life-threatening (e.g. malignant hypertension) and/or reversible conditions (e.g. infectious neuropathy) which must be recognised and treated immediately
  4. Glaucoma is a chronic eye disease that leads to irreversible vision loss. The cup to disc ratio (CDR) plays an important role in the screening and diagnosis of glaucoma. Thus, the accurate and automatic segmentation of optic disc (OD) and optic cup (OC) from fundus images is a fundamental task. Most existing methods segment them separately, and rely on hand-crafted visual feature from fundus.

Optic Disc Drusen - EyeWik

  1. ing the optic disc (OD) which is an important step in the diagnoses of glaucoma. This is done by estimating the cup-to-disc ratio (CDR). In this paper, we proposed a Cup Disc Encoder Decoder Network (CDED-Net) for the joint segmentation of optic disc (OD) and optic cup (OC)
  2. antly referred to as glaucoma; however, it is not only glaucoma that leads to pathological optic disc excavation. A number of other nonglaucomatous diseases also result in optic atrophy and excavation of the optic disc. Therefore, in the present study, the etiology of nonglaucomatous optic disc cupping (NGODC) was analyzed and differentiated.
  3. Disc hemorrhaging typically accompanies the edema. On average, the optic disc edema resolves within 4 to 8 weeks with subsequent retinal nerve fiber layer (RNFL) loss and diffuse or segmental.
  4. Optic disc drusen (ODD) are acellular deposits located in the optic nerve head of up to 2.4% of the population. They may develop as by-products of impaired axonal metabolism in genetically predisposed individuals, in whom a narrow scleral canal is hypothesized to play a role
Progression of asymptomatic optic disc swelling to non

Evaluating the cup and disc in glaucoma - EyeGur

The optic nerve is located in the back of the eye. It is also called the second cranial nerve or cranial nerve II. It is the second of several pairs of cranial nerves. The job of the optic nerve. Consider optic disc drusen in optic disc swelling to ensure appropriate investigations and management We report a patient with optic disc drusen, a common anomaly that may mimic papilloedema (swelling of the optic discs as a result of raised intracranial pressure). We suggest that optic disc drusen (globular collections of calcific material in the optic nerve head1) should be considered.

Video: Optic disc abnormality DDx • LITFL • CCC Differential

Congenital Disorders that Obscure the Margin of the Optic Disk

Purpose To investigate the optic disc and peripapillary vessel density, as well as its ocular and systemic associations, in healthy eyes among adult Chinese population. Methods A population-based cross-sectional eye survey was conducted on Chinese adults residing in Hong Kong. 1891 eyes from 1891 participants who completed 4.5×4.5 mm optical coherence tomography angiography scans were. Optic gliomas are rare. The cause of optic gliomas is unknown. Most optic gliomas are slow-growing and noncancerous and occur in children, almost always before age 20. Most cases are diagnosed by 5 years of age. There is a strong association between optic glioma and neurofibromatosis type 1 Code repository for a paper Optic Disc and Cup Segmentation Methods for Glaucoma Detection with Modification of U-Net Convolutional Neural Network. computer-vision paper medical-imaging ipynb cup-segmentation-methods optic-disc glaucoma-detection. Updated on Apr 1, 2020. Jupyter Notebook Optic nerve head elevation is an important physical examination finding in the evaluation of patients with visual disturbances or vision loss. It may be associated with optic disc edema or not (pseudoedema). Common causes of optic nerve head elevation because of optic disc edema include elevated intracranial pressure (papilledema), optic.

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