Optic disc

Optic disc definition of optic disc by Medical dictionar

Optic Disc. Eye fundus plays an important role in detecting various eye diseases; it consists of retina which is the transparent, light-sensitive structure at the back of the eye, optic nerve disc, and blood vessels (retinal arteries and veins) Optic Disc. Optic disc imaging techniques, such as scanning laser tomography with the Heidelberg Retina Tomograph (HRT) II, provides repeatable, objective and quantitative three-dimensional imaging of the optic nerve, that is particularly useful for individualised analysis of change or progression of the neural retinal rim and/or optic cup (Flanagan 2001) 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.The 1.0 to 1.2 million ganglion cell nerve fibers or axons leave the eye at the disc and form the.

Optic disc: The circular area in the back of the inside of the eye where the optic nerve connects to the retina. Also called the optic nerve head Optic disc drusen (ODD) are globules of mucoproteins and mucopolysaccharides that progressively calcify in the optic disc. They are thought to be the remnants of the axonal transport system of degenerated retinal ganglion cells. ODD have also been referred to as congenitally elevated or anomalous discs, pseudopapilledema, pseudoneuritis, buried disc drusen, and disc hyaline bodies 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 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,. Optic nerve head drusen. Optic nerve head drusen is the most common cause of pseudopapilledema, occurring in 0.34%-2.4% of individuals.A complete review of optic disc drusen can be found on the optic disc drusen page.Drusen consists of extracellular deposits of calcium, hyaline, and other proteins caused by impaired axoplasmic flow resulting in extrusion of drusen or degeneration of the.

Optic Disc - an overview ScienceDirect Topic

Optic neuritis with marked distension of the optic nerve

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

Optic Disc Examination - a few essentials. Posted on 17/05/2017 08/01/2018 by stankeys in Other ocular pathology. In this latest blog post I thought it might be useful to give a short overview of how to examine the optic nerve head. I currently do a lot of hospital glaucoma clinics, as this is my main area of clinical interest 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 Optic disc drusen often appear with small and crowded optic discs that have a lumpy, bumpy appearance. Drusen are most often concentrated in the nasal half of the optic disc with associated vascular anomalies such as tortuous and dilated veins, cilioretinal arteries, and optociliary shunt vessels (Erkkilä, 1976) The optic disc (or optic disk optic nerve head, optic papilla or blind spot) 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 thus it is also known as the blind spot

Epidemiology. Optic disc drusen are identified radiographically in up to 0.3-3.7% of the population and are frequently bilateral 1,4,5.They are typically seen in patients with age-related macular degeneration 7.They can also be familial and inherited as a dominant trait 1,4.In general, they are more common in Caucasians than African-Americans 4.. 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-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

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 The optic disc represents the beginning of the optic nerve and is the point where the axons of retinal ganglion cells come together. The optic disc is also the entry point for the major blood vessels that supply the retina. [1] The optic disc in a normal human eye carries 1-1.2 million afferent nerve fibers from the eye towards the brain

Definition of Optic disc - MedicineNe

Optic disc drusen - Wikipedi

The optic disc is the intraocular portion of the optic nerve and is seen with the ophthalmoscope. Its margins, color, and cup-disc ratio should be determined. 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. 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 nerve hypoplasia is the most common optic disc anomaly encountered in ophthalmic practice. It is bilateral in 75% of cases. Mothers of people with optic nerve hypoplasia may have certain risk factors: Diabetes; Alcohol abuse (fetal alcohol syndrome) Illicit drug abuse; Medication use: quinine, anticonvulsants; Certain infections: CMV. The differential diagnosis of swollen optic nerves differs according to whether the swelling is unilateral or bilateral, or whether visual function is normal or affected. Patients with a unilaterally swollen optic nerve and normal visual function most likely have optic nerve head drusen. Patients with abnormal visual function most likely have demyelinating optic neuritis or non-arteritic.

How to Evaluate the Suspicious Optic Disc

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 Conversely, optic disc swelling can be simulated by a large number of axons passing through a small optic disc. Characteristically the optic disc looks 'small', especially when compared to a normal fellow eye and there may be a disparity between the retinal and scleral aperture. The visual deficit can vary from normal to severely defective

Optic disc hemorrhages: Also referred to as splinter hemorrhages or drance hemorrhages . They are seen more commonly in patients of normal tension glaucoma than COAG. They tend to come and go and reappear at same site or different site. They typically cross the disc margin but during resorption,. The Optic Neuritis Study Group. N Engl J Med. 1993 Dec 9;329(24):1764-9. PMID: 8232485. The 5-year risk of MS after optic neuritis. Experience of the optic neuritis treatment trial. Optic Neuritis Study Group. Neurology. 1997 Nov;49(5):1404-13. PMID: 9371930. Patel V, Oetting TA. Optic Nerve Drusen: 19 year-old female with blurred vision. Optic Disc Leer en Español: Disco Óptico. Mar. 28, 2016 The structure around the optic nerve where it enters the back of the eye. Read an overview of general eye anatomy to learn how the parts of the eye work together. Find an Ophthalmologist. Search. Advanced Search. Ask an. 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 Optic disc drusen may be an independent risk factor for the development of nonarteritic anterior ischemic optic neuropathy in younger patients, according to a study published in the American.

Define optic disk. optic disk synonyms, optic disk pronunciation, optic disk translation, English dictionary definition of optic disk. n. Anatomy See blind spot. Noun 1. optic disk - the point where the optic nerve enters the retina; not sensitive to light optic disc,. 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. Video Showing the Optic Nerve View Video View the video transcript Define optic disc. optic disc synonyms, optic disc pronunciation, optic disc translation, English dictionary definition of optic disc. n a small oval-shaped area on the retina marking the site of entrance into the eyeball of the optic nerve

Is Optic Disc Size a Risk Factor for Glaucoma

  1. Definition of optic disc. Neuroscientifically Challenged is a neuroscience learning resource. In addition to a blog that discusses science current events in a non-technical manner, you will also find a number of videos and articles that you can use to learn about basic principles of science and the brain
  2. Overview. 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
  3. Morning glory disc Optic disc drusen Medullated nerve fibres Optic disc pit Optic disc hypoplasia Myopic disc Optic disc coloboma Optic disc pit 9. PATTERNS • Ischemic (anterior ischemic optic neuropathy) • Inflammatory • Toxic/ nutritional • Compressive • Traumatic • Hereditary 10
  4. ant 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

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 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 disc cupping has been recognized as an important characteristic of the glaucomatous process since the 19th Century. Quantification of the size of the cup and its relationship to the size of the optic disc, i.e the cup/disc (C/D) ratio, has been widely used in the differentiation of glaucomatous from normal eyes optic discの意味や使い方 視神経乳頭板; 視神経円板; 視神経乳頭 - 約1161万語ある英和辞典・和英辞典。発音・イディオムも分かる英語辞書 Purpose To determine the optic disc-fovea angle (defined as angle between the horizontal and the line between the optic disc center and the fovea) and to assess its relationships with ocular and systemic parameters. Methods The population-based cross-sectional Beijing Eye Study 2011 included 3468 individuals. A detailed ophthalmic examination was carried out Optic disc pits are considered as part of a spectrum of congenital cavitary anomalies of the optic disc, which also includes optic disc coloboma, morning glory and extrapapillary cavitation [].Histologically, an ODP is a herniation of dysplastic retina into a collagen-rich excavation that extends into the subarachnoid space through a defect in the lamina cribrosa [] The optic disc may appear normal, swollen, or hyperemic in early stages. With hyperemia, disc haemorrhages may also be present. Continued damage to the optic nerve results in the development of optic atrophy, classically seen as temporal pallor of the optic disc. Treatment: This is dictated by the cause of the disorder. Prognosis

Pseudopapilledema - EyeWik

Definition of optic disc in the Definitions.net dictionary. Meaning of optic disc. What does optic disc mean? Information and translations of optic disc in the most comprehensive dictionary definitions resource on the web Agurto et al., Fast localization and segmentation of optic disk in retinal images using directional matched filtering and level sets, IEEE Transactions on Information Technology in Biomedicine, vol. Automatic Optic Disc Detection in Color Retinal Images by Local Feature Spectrum Analysis The center of the optic disc (known as the cup) becomes larger, and the cup to optic disc ratio increases alarmingly. This process is referred to as optic nerve cupping Optic Disc Phenotypes Show Specific Gaps in Visual Fields, Study Find 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

A Detailed Look at Optic Nerve Anomalie

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 Optic disk definition at Dictionary.com, a free online dictionary with pronunciation, synonyms and translation. Look it up now

Optic Atrophy - EyeWik

The optic disc, also known as the optic nerve head, forms a slightly raised spot on the nasal side of the retina. Here, there are no photoreceptors, hence it is known as the blind spot of the eye Coloboma of the optic nerve is a congenital eye abnormality in which the optic nerve (which carries images of what the eye sees to the brain) is incompletely formed. The condition may occur in one or both eyes. The degree of visual impairment varies widely depending on the severity and structures involved OPA1 optic disc atrophy.png 512 × 341; 330 KB Optic cup and macula - 3D anaglyph.jpg 782 × 519; 294 KB Optic cup and macula - 3D motion parallax.gif 706 × 497; 594 K

Optic disc - IMAIO

Optic Disc Examination - a few essentials - OPTOMETRY

  1. Optic disc drusen are small calcified crystals that form in the tip of the optic nerve, which is called the optic disc. The optic nerve connects the eye to the brain and your eye doctor is able to see the optic disc by looking into the back of your eye. Optic disc drusen are surprisingly common, and can be found in 1-2% of people on autopsy
  2. Optic disc tilt can lead to significant changes in optic disc appearance [5,6,7] and affects ocular parameters used in the majority of ophthalmic devices, such as optical coherence tomography [8, 9] and visual field analyzers [10,11,12], which are the most widely used devices in ophthalmology
  3. Norwegian Translation for optic disc - dict.cc English-Norwegian Dictionar
  4. As optic disc cupping progresses, the loss of optic nerve fibres can begin to impact your vision — primarily affecting your peripheral vision. 5 Since the loss of vision is very slow and gradual, the person affected may not notice it until significant peripheral vision has been lost
  5. While papilledema is disc edema secondary to increased intracranial pressure, pseudopapilledema is apparent optic disc swelling that simulates some features of papilledema but is secondary to an underlying, usually benign, process. Most patients with pseudopapilledema lack visual symptoms, not unlike patients with true papilledema
  6. Abstract. Visual field defects due to optic nerve changes are common in eyes with pathologic myopia (PM). However, it is sometimes difficult to suspect the presence of visual field defects because of the existing deformity of the optic disc
  7. The optic disc excavation. Definition. Papilla excavation is the deepening of the so-called optic nerve papilla. The papilla is the point in the eye where the optic nerve enters the eyeball. There is no retina at this point, so this part of the eye is not required for active vision..

Optic disc drusen: understanding an old problem from a new

  1. This is a recently described type of nanophthalmos with characteristic clinical features plus retinal degeneration and optic disc drusen. Hyperopia is common and, like another recessive form of nanophthalmos (), patients have a progressive retinal dystrophy beginning with granular and mottled RPE changes and progressing to a bone spicule pattern resembling retinitis pigmentosa
  2. 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 ophthalmologis
  3. Optic disc drusen are hyaline bodies in the optic disc substance. Their prevalence is 3.4 - 24 per 1,000 and areusually bilateral . They are usually located most commonly nasally and are difficult to visualize in childhood as they are buried but become more obvious in adolescence
  4. GLAUCOMA Glaucoma fundamentals Optic disc hemorrhage: Dont miss the signal by Stefanie Petrou Binder, MD, EyeWorld Contributing Writer EyeWorld is pleased to present our second Glaucoma Fundamentals column. The purpose of this column is to provide practical and usable tips for managing glaucoma issues in your daily practice. In this months column, we address the importanc
  5. a cribrosa and capillary network physiological blind spot
  6. The optic nerve 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 surface of the retina and their central processes pass via the optic disc.
  7. antly calcified deposits in the optic nerve head with an estimated prevalence of 2.4% ().The condition is generally benign, with rare complications such as anterior ischemic optic neuropathy and retinal vascular occlusions ().Confusion can arise because the frequently observed protrusion of the optic disc and blurring of the optic disc margin can be mistaken.

Optic Disk Anomaly - an overview ScienceDirect Topic

  1. Optic Disc Apperance Joshua Kruger. Loading... Unsubscribe from Joshua Kruger? 9 EXAMINATION Optic Nerve Head and Nerve Fiber Layer Changes in Glaucoma - Duration: 32:02
  2. It is possible to quantify the areas of the optic disc, neuroretinal rim, and optic cup by computer aided analysis of optic disc photographs (planimetry)1 2 or by more recently available imaging techniques, such as scanning laser ophthalmoscopy,3 video-ophthalmography,4 and simultaneous stereo optic disc photography with digital photogrammetry.5 However, only the most fortunate of clinicians.
  3. Optic disc drusen is a condition that affects vision and the optic nerve - the connection between the eye and the brain. For unknown reasons, damaged optic nerve axons lead to calcium-containing deposits at the optic nerve head. These deposits are present in about 2-4% of the general population, and.
Pathogenic Implications of Subretinal Gas Migration

Optic disc drusen are usually not visible at birth and are rarely found in infants and children. The drusen tend to develop slowly over time as the abnormal material collects in the optic nerve head and calcifies. The average age when optic disc drusen first appear is about 12 The optic disc or 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 thus it is also known as the blind spot or anatomical blind spot; the break in the visual field created by the optic disc is also called the blind spot or physiological blind spot

Optic disc Psychology Wiki Fando

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 thinne death of optic nerve fibers lead to the loss of tiny disc vessels optic atrophy physiologic cup enlarged, occupy more than 1/2 dics diameter (could extend to edge of disc)retinal vessels sink in and under the cup and may be displaced nasally The various optic disk segmentationand blood vessel enhancement algorithms for the retinal and fundus images were studied in this survey. In these papers different methods were used for the detection and segmentation of optic disk using template based and morphological based methods. It might provide false edge detections Obesity is on the rise in the United States and worldwide. In turn, the incidence of idiopathic intracranial hypertension (IIH), also known as pseudotumor cerebri (PTC), is also rising. 1 IIH initially presents as bilateral optic disc edema of unknown cause, and there are several etiologies, some of which are potentially deadly. Therefore, IIH is always a diagnosis of exclusion Introduction. Myopic eyes are often accompanied by tilted optic discs, which are associated with a series of findings, including a vertically oval optic disc,1-3 nasally undermined cupping, 1,4 nasally displaced vessels in the cupping,1,3,4 and the presence of a temporal crescent.1-3,5 In our clinical practice in Japan, we observed that an optic disc with the simultaneous presence of the.

Optic disc drusen Radiology Reference Article

Since optic disc is the most important part of retinal fundus image for glaucoma detection, this paper proposes a two-stage framework that first detects and localizes optic disc and then classifies it into healthy or glaucomatous. Method The optic disc or 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

Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube Optic Disc Drusen. 2007-2008;129. Purvin V, King R, Kawasaki A, Yee R. Anterior ischemic optic neuropathy in eyes with optic disc drusen. Arch Ophthalmol. 2004;122(1):48-53. Sarkies NJ, Sanders MD. Optic disc drusen and episodic visual loss. Br J Ophthalmol. 1987;71(7):537-539. Mustonen E. Pseudopapilloedema with and without verified optic disc.

The pictures below illustrate the appearance of the optic nerve as seen by your ophthalmologist. The optic nerve is the round, yellow/pink area with the blood vessels radiating out from the center. Figure 1 shows a normal optic nerve. Notice that the optic nerve is circular with sharp edges. Figure 2 shows an eye with optic nerve drusen (anatomy) The location where ganglion cell axons exit the eye to form the optic nerv Normal or swollen optic disc; disc pallor occurs later (4-6 weeks after onset). Visual field defect - any type. Normal macula and peripheral retina. Patient aged <12 or >50, black or Asian race. Symptoms: Bilateral reduction in vision. Time course: Vision loss continuing to progress >2 weeks after onset. No recovery by 5 weeks after onset

Optic disk definition of optic disk by Medical dictionar

For that matter, I have to segment out optic disc as one of the pre-processing step. For this particular step I am following the paper tilted Automatic Optic Disk Segmentation in Presence of Disk. Abstract. Accurate segmentation of optic disc (OD) and optic cup (OC) is a fundamental task for fundus image analysis. Most existing methods focus on segmenting OD and OC inside the optic nerve head (ONH) area but paying little attention to accurate ONH localization During this examination, your doctor shines a bright light into your eye and examines the structures at the back of your eye. This eye test evaluates the optic disk, where the optic nerve enters the retina in your eye. The optic disk becomes swollen in about one-third of people with optic neuritis. Pupillary light reaction test

Melanocytoma of the Optic Nerve Associated With SoundNeovascularization of the Optic Disc | JAMA OphthalmologyFundus photography - WikipediaBilateral optic disc drusen mimicking papilloedema

Optic Disc The optic disc is also called the blind spot. It is called this because there are no receptors in this part of the retina. This is where all of the axons of the ganglion cells exit the retina to form the optic nerve.. You can prove to yourself that this part of the retina is, indeed, blind As long as the optic disc is not swollen and there are signs of normal in Read More. 0. 0 comment. 1. 1 thank. Send thanks to the doctor. A 46-year-old female asked: In 2010, I was treated 4 optic disc swelling+high eye pressure. For >7d now, I have blurry vision in right eye and [email protected] top head right side Optic disc haemorrhage. splinter haemorrhage-can be seen in normals but are associated with progression of disease particularly in NPG. particular seen in infero-temporal region. may precede optic disc change and field loss. Optic cup enlargement can progressive in advance of pallor Optic disc extraction or segmentation is performed using segmented reference images called ground truth on which the optic disc is accurately marked by ophthalmologists. The OD processing includes two main steps: localization (detecting the center point of OD) and segmentation (detecting the disc boundary) [ 32 ] Optic neuritis may be related to specific infections, diseases of the adjacent sinuses or orbital structures, and infectious and infiltrative diseases of the brain or meninges that involve the optic nerves. The image below depicts optic disc swelling in a child with bilateral optic neuritis

noun the point where the optic nerve enters the retina; not sensitive to light • Syn: ↑blind spot, ↑optic disk • Hypernyms: ↑point • Part Holonyms: ↑retina * * * optic disc nou Optic disc changes in Glaucoma is one of the most frequently asked topics in Ophthalmology. However, students are often found to have difficulty in understanding and remembering them. Hence, I came up with an idea to illustrate them with schematic diagrams and mnemonics to simplify the topic If the optic disc appears elevated and has a blurred outside edge, your doctor can diagnose papilledema. The pressure within the nerve can cause the draining veins in your eye to become congested. Also, very tiny pulsations that normally are seen in the eye's veins tend to disappear

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Optic disc vessel density in nonglaucomatous and glaucomatous eyes: an enhanced-depth imaging optical coherence tomography angiography study Yuji Yoshikawa,1 Takuhei Shoji,1 Junji Kanno,1 Itaru Kimura,1 Masanori Hangai,2 Kei Shinoda1 1Department of Ophthalmology, Saitama Medical University, Saitama, Japan; 2Hangai Eye Institute, Saitama, Japan Purpose: To evaluate the ability of enhanced-depth. linical and optic disc features are associated with VR in patients with LHON. Methods: We retrospectively examined 80 eyes of 40 patients with LHON using clinical databases, fundus photographs, and high-definition spectral-domain optical coherence tomography (OCT) images. VR was defined as a gain of 3 or more lines of logarithm of the minimum angle of resolution (logMAR)-scaled visual acuity. A n optic disk pit (ODP) is a congenital round or oval depression in the optic disk. ODPs are usually unilateral, with an equal gender predilection and an incidence of one in 11,000. 1 They are most commonly found at the inferotemporal aspect of the disk, but they may also be found elsewhere, including centrally. 2 Optic Disc Segmentation: The OD is the location where ganglion cell axons exit the eye to form the optic nerve through which visual information of the photo-receptors is transmitted to the brain. Earlier, the template based methods are proposed firstly to obtain the OD boundary optic disc: 1 n the point where the optic nerve enters the retina; not sensitive to light Synonyms: blind spot , optic disk Type of: point the precise location of something; a spatially limited locatio The optic nerve can also be damaged by shock, toxins, radiation, and trauma. Eye diseases, such as glaucoma, can also cause a form of optic nerve atrophy. The condition can also be caused by diseases of the brain and central nervous system. These may include: Brain tumor

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