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What is notching of optic disc

Since glaucomatous discs tend to present with thinning and/or notching of the inferior and/or superior disc rims, they will not follow the ISNT rule. A suspicious optic disc in a patient with normal IOP readings and normal automated perimetry (white-on-white) Clinical pearl: Notching does not occur commonly on the temporal or nasal aspect of the disc. Temporal thinning of the disc is most commonly an anomaly of disc insertion and not glaucoma. The term temporal thinning, in the absence of other glaucomatous disc changes, is meaningless Moreover, what is notching of optic disc? The axons of these ganglion cells occupy the central part of inferior and superior parts of the disc respectively. Since these are damaged in the initial stages, the axons central part of inferior and superior disc are lost leading to notch. Beside above, what is suspicious glaucoma

Monitor or Medicate?

How to Evaluate the Suspicious Optic Dis

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 Tilted discs are fairly common, especially in cases of high myopia. They are usually bilateral (80%). The superotemporal aspect of the optic nerve is typically elevated, which can mimic optic nerve edema. There can be situs inversus of the retinal vessels (increased branching of the retinal vessels nasally) Cupping is the result of changes in the optic nerve related to optic nerve degeneration, where there is a backward bowing of the central part of the disc. When your optic disc is seen in three dimensions, the cupping can be very obvious to your eye doctor

The Glaucomatous Disc | Ophthalmology Self-Guided Study

Notching of the neuroretinal rim is a sign that a focal area of loss occurred within the rim tissue. Notching most commonly occurs at the inferior temporal or superior temporal aspect of the disc and often is associated with corresponding nerve fiber layer defects.4 Optic nerve rim notching is believed to be secondary to ischemia Focal notching, preservation of disc color, retinal nerve fiber layer defects, and cupping of disc strongly favors glaucomatous optic neuropathy Surrounding retinal examination is mandatory to look for findings like arteriolar attenuation or sheathing, bony spicules, retinal pigment epithelial mottling, choroiditis patches or extensive PRP marks

Poag 28

  1. 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
  2. The optic nerve (optic disc, optic disk, optic nerve head [ONH]) area is approximately 2.1-2.8 mm 2 in whites who are not highly myopic depending on the measurement method utilized. The optic nerve size changes in early life and is likely stable after age 10
  3. No associations were found with intraocular pressure, optic disc hemorrhage, or migraine history. After adjusting for other risk factors, a neural rim notch was strongly associated with glaucoma diagnosis (OR 21.2, CI 8.8-50.8)
  4. 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
  5. METHODS: Fourteen glaucoma subspecialists classified notching in 26 pairs of stereoscopic disc photographs of eyes with mild to severe glaucomatous optic neuropathy. They classified images as showing either no notching, notching not to the edge, or notching to the edge. Several hours later, 10 of them classified the same images a second time
  6. 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
  7. l Optic disc (Drance) hemorrhages l Baring of circumlinear vessel l Bayonetting »Very advanced stage change Vascular Signs Baring of Vessel Drance Hemorrhage Optic disc hemorrhages l Appearance may precede NFL loss, notching, VF defect Associated with progressive VF defects in glaucoma or OHT (up to 20X greater risk)

What is notching in glaucoma? - FindAnyAnswer

Optic Nerve Cupping Glaucoma Research Foundatio

  1. Vertical enlargement of the optic cup as a result of retinal nerve fiber loss and/or disc rim loss (especially at the superior and inferior poles) Asymmetric cupping (0.2 cup-disc ratio difference) between the two eyes Changes in vessel configuration and calibe
  2. ation: look at the opposite eye for any cup asymmetr
  3. While thinning of the optic nerve rim is observed in all POAG, focal thinning or 'notching' is more commonly observed in NTG. Classically, the presence of small flame shaped optic disc hemorrhages, also known as Drance hemorrhages, has been associated with NTG though this finding can be observed in any form of POAG
  4. Optic neuritis (ON) is a common manifestation of multiple sclerosis (MS), and refers to inflammation of the optic nerve. It can be the initial demyelinating event in up to 20% of patients, and occurs in almost half of patients with MS.1 ON associated with demyelinating disease is generally characterized by acute to subacute, painful, and.
  5. Specific Signs of Optic Disc Changes In Glaucoma : . • Optic disc cupping. • Large optic cup (vertical CDR 0.7 or more) • Asymmetry of cup/disc ratio (0.2 or more) • Progressive enlargement of optic cup. • Does not obey the ISNT rule. • Focal notching of rim. • Regional pallor
  6. 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. Through periodic photographs of the optic nerve, the ratio of the cup to the disc can be monitored

Roles of Glaucomatous Optic Disc Diagnosis. Primary open angle glaucoma is a common eye disease characterized by loss of the axons of the retinal ganglion cells leading to progressive loss of vision. The site of damage to the axons is at the level of the lamina cribrosa in the optic nerve head. The mechanism of axonal loss is unknown but. Focal notching is very characteristic of glaucoma and tends to be inferio- or superio- temporal. It can become a full-thickness notch with complete abscence of the rim. It may be very deep and it may be associated with peripapillary atrophy. Progression will cause this area to enlarge

Congenital Optic Disc Anomalies — Ophthalmology Revie

  1. a cribrosa. These fibres are then bundled together behind the eye as the optic nervewhich continues towards the brain
  2. Focal notching is a localized ischemic loss of neural rim and is most likely to be confused with a congenital optic pit. A generalized enlargement of the cup from glaucoma can lead to the appearance of bean-pot cupping in the late stages of the disease process. A normal intraocular pressure in the presence of an anomalous optic disc.
  3. 1. Optic disc pallor in excess of cupping. Various insults can occur to the optic nerve and manifest ophthalmoscopically as pallor, atrophy, cupping and notching. By far, the most common optic nerve affliction is glaucoma. Glaucoma presents with a very characteristic cavernous atrophy, commonly termed cupping or notching.
  4. Notching of Optic Nerve Rim Inferiorly Progression of glaucoma in the left eye. Past 3-years, developed a notch inferior to the optic disc in the left eye
  5. Notching of the disc rim, as well as bleeding at the disc margin, may also occur. Progressive optic disc cupping is a sign of continuing retinal nerve fiber layer thinning. Clinical studies show that lowering the eye pressure by 20 to 30 percent effectively halts the optic nerve damage in most cases
  6. ation: look at the opposite eye for any cup asymmetr

Optic Nerve Degeneration & Glaucoma BrightFocus Foundatio

The presence of notching or the complete obliteration of the neuroretinal rim is highly specific to glaucoma. 13,14 Another highly specific sign of glaucomatous cupping is the presence of a hemorrhage on the optic disc. VF Correlation . The VF defects associated with glaucoma show a high degree of correlation with the appearance of the optic disc 'notch') to circumferential thinning of the entire neuroretinal rim. DISPLACEMENT OF THE RETINAL VESSELS Distinction was made between a gradual curve of a retinal vessel as it passed over the surface of the optic disc and a sharp 'kinking' or change in the vessel's direction either in the same plane as the disc surface or at an angle to it notch for optic disc accommodation and the other side ( −X p direction) has suture lugs for a suture on the surface of the eye [Figs. 1(b) -1(c)]. Seed(s) in the notch side are removed to reduce optic disc dose. Table 1 shows seed position number(s) removed from standard COMS plaque Consequently, the cup enlarges. The amount of cupping is often described by the eye doctor as the cup-to-disc ratio (C/D ratio). Figure 1-5. The optic nerve is divided into tenths and the cup is compared to the entire optic nerve (optic disc) to obtain the cup-to-disc ratio. This C/D ratio here is 0.4 Beta zone peripapillary atrophy was seen in 78 eyes. Another important parameter of the optic disc is notching. In 53 eyes notching was seen. Out of these, 35 eyes show superior notching, of which 33 eyes (94.3%) correlated with inferior field defects. 18 eyes show inferior notching, and all of them showed superior field defect

There is a physiological relationship between optic disc size and cup size, so that large optic discs have large cups, and small discs should have small, or absent, cups. 8 The neuroretinal rim is the tissue in between the outer edge of the cup and the optic disc margin. Normally, circumlinear blood vessels rest on the neuroretinal rim tissue So at the optic nerve, if you have loss of the optic disc tissue, you lose the nerve fiber layer. You lose that axon as it goes back to the ganglion cell. There's retrograde loss. And so if the optic disc is losing those axons, all over the place, you get generalized cupping, and you also get generalized loss of the nerve fiber layer Optic Disc Size Measurement of optic disc size with biomicroscopy Volk lens Measure length of slit beam Avg vertical diameter: 1.8 mm Correction factors Volk 60D -x 1.0 Volk 78D -x 1.1 Volk 90D -x 1.3 Avg horizontal diameter: 1.7 mm Optic Disc Size Large Disc Size: Megalopapilla= ≥ 2.5 mm2 Other Key Signs: Baring of Vessel Drance Hemorrhag Valid for Submission. H47.399 is a billable diagnosis code used to specify a medical diagnosis of other disorders of optic disc, unspecified eye. The code H47.399 is valid during the fiscal year 2021 from October 01, 2020 through September 30, 2021 for the submission of HIPAA-covered transactions

Optic disc. Optic disc changes seen on clinical examination of patients with POAG include: High cup:disc ratio (Figures 1 and 2) Cup:disc ratio asymmetry between eyes (usually considered significant if greater than 0.2) Vertical elongation of cup; Focal neuro-retinal rim thinning or notching (Figure 1) Vessel bayoneting (Figure 2 1) increased cup-to-disc ratio (i.e. the ratio of the optic cup in the central optic disc to the margin of the optic disc), 2) notching of the neuroretinal rim (focal loss of the margin of the optic disc margin), 3) symmetry of optic disc cupping, and 4) loss of retinal nerve fiber layer. We assessed optic discs from patients with different. Optic Disc Size Measurement of optic disc size: • Biomicroscopy: -Volk lens -Measure size of slit beam • Correction factors: -Volk 60D - x 1.0 -Volk 78D - x 1.1 -Volk 90D - x 1.3 Average vertical diameter: 1.8 mm Average horizontal diameter: 1.7 mm ©2003, Remo Susanna Jr, MD Optic Disc Size Small Medium Larg CONCLUSION: Without definitions or examples of optic disc rim notching, the glaucoma subspecialists had relatively high intraobserver agreement but were likely to disagree with each other in characterizing the degree of disc rim notching. We recommend development of a standard photographic classification of disc rim notching

Monitor or Medicate? - Review of Optometr

Notching (focal loss of ganglion cell axons) usually occurs at what locations? Superior temporal + inferior temporal poles of ONH (most often inferior pole) What is an acquired pit of the optic nerve and localized notching in the neuroretinal rim was noted in 188 (94%) and 86 (43%) patients, respectively. Optic disc hemorrhage, Optic disc pallor and Optic disc atrophy was seen in 80 (40%), 127 (63.5%) and 15 (7.5%) cases, respectively. Mean VDD was 1.76mm in both right and left eyes. Mean vertical and hori of the optic disc is notching. In 53 eyes notching was seen. Out of these, 35 eyes show superior notching, of which 33 eyes (94.3%) correlated with inferior field defects. 18 eyes show inferior notching, and all of them showed superior field defect. Inferio

Understanding Optic Disc Pallor- Shades of Whit

The optic disc segmentation is the primary step for automatic processing of the fundus image, hence a considerable amount of research work is available. The earliest attempt of optic disc segmentation was made by shape based template matching in which the disc is modeled as either circular [7-9] or elliptical . This method was unable to. Myopic glaucomatous disc: a myopic disc with a temporal crescent and additional evidence of glaucomatous damage. 6. Focal ischaemic: a disc with a focal notch. For the purposes of this study, the. neuroretinal rim. A term used in describing the area of the optic disc which contains the neural elements and is located between the edge of the disc and the physiological cup. When describing the neuroretinal rim, as is often done in cases of glaucoma, one must include its colour, size, slope and uniformity. Syn. neural rim Narrow angle eyes were defined as the following: (i) the pigmented trabecular meshwork was not visible for ≥ 180° on gonioscopy, (ii) untreated IOP ≤ 21 mmHg, (iii) no peripheral anterior synechiae (PAS) was observed, and (iv) optic discs were without glaucomatous changes, defined as neuroretinal rim thinning, focal notching, disc.

cupped out disc, glaucoma, notching, inferior notch Photographer Dr. John Davis Imaging device HopeScope - Smartphone Fundus Camera Description Optic disc cupping in right eye of a young glaucoma patient. Related file - Optic disc - sector notching - Optic disc - sector notching (finding) Hide descriptions. Concept ID: 247221005 Read Codes: X75oN ICD-10 Codes: H473 Powered by X-Lab. This tool allows you to search SNOMED CT and is designed for educational use only. The full SNOMED CT. the optic disc may be the cause of disc pallor. The Kestenbaum index is the number of capillaries counted on the optic disc, which normally is around 10. Less than 6 capillaries indicates optic atrophy; more than 12 suggests disc hyperaemia. Optic Atrophy Major Review Dept. of Neuro Ophthalmology, Sankara Netralaya, Chenna Disc hemorrhages usually occur at the border of the optic disc in the neurofiber layer, although they may also occur inside or just outside the disc edge. They're sometimes called splinter hemorrhages, because they look like splinters running parallel to the nerve fibers in the nerve fiber layer, or Drance hemorrhages, after Steven Drance, MD.

Shedding Light on a Pale Optic NerveGonioscopy and optic nerve head evaluationOptic nerve head evaluation in glaucoma

Optic disc: cupping: generalised thinning, focal narrowing or notching of neuroretinal rim; cupping should be considered in relation to disc size; CD ratio >0.6 or R:L asymmetry ≥ 0.2 suspicious of glaucoma; disc margin haemorrhage is an important prognostic sign but not necessarily diagnostic of glaucoma (more common in Normal Tension Glaucoma 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 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

Absence of glaucomatous optic neuropathy was defined as a vertical cup-disc asymmetry between eyes of less than 0.2, a cup-disc ratio of 0.6 or less, and an intact neuroretinal rim without notching or excavation The optic nerve is a bundle of more than 1 million nerve fibers. Nerve signals travel along the optic nerve from each eye and send visual information to the brain. Damage along the optic nerve pathway causes specific patterns of vision loss. The three types of vision loss caused by optic nerve disorders are

Ophthalmoscopy, direct or indirect. Tomography is newer and better way to judge ,but is expensive and not all offices have one. Direct ophthalmoscopy is when the DR, gets real close holding a flashlight looking instrument to look in. Indirect the. optic disc into four arcades (superonasal, superotemporal, inferonasal, inferotemporal vessels). The macula is the portion of the retina surrounded by the temporal vessels. The fovea is the center of the macula. Despite its small size, the fovea is responsible for most of our visual acuity. Beyond the macula, the retina is broken down int Left: Normal optic disc. Vertical cup/disc ratio = 0.2. Middle: Moderate glaucoma (left eye). Vertical cup/disc ratio = 0.7 with a notch at 1 o'clock. The curve of the vein at 5 o'clock suggests a reduced rim thickness. There is a wedge defect in the retinal nerve fibre layer between 12 and 2 o'clock. There is moderate nasal displacement. Focal notching of the neuroretinal rim with a corresponding VF defect, which threatens fixation early in the disease, is described as FE type of glaucoma. 9, 30, 31 Earlier age of onset, female gender, occurrence of disc hemorrhage, and primary vascular dysregulation syndromes (vasospasm, migraine, nocturnal hypotension, Raynaud phenomenon) are. DH has been associated with notching, progressive changes in the optic disc rim, localized RNFL defects, and enlargement of localized RNFL defects.[7-10] Normal-tension glaucoma (NTG) eyes with DH have a thinner lamina cribrosa. These findings suggest that structural changes at the lamina cribrosa, optic disc, or RNFL may contribute to.

Normal Optic Disc - Physical Diagnosis - Mitch Medical

disc hemorrhage, glaucomatous optic neuropathy, peripapillary atrophy, disc cupping, disc notching, asymmetry of disc shape, disc vertical elongation. Optic homorrhages, zonebeta to alpha ratio, barring of circumlinear vessels, bayoneting, capillary dropout, proximal constriction of retinal arteriole. CHANGES IN: optic nerve , nerve fiber layer. Tomlinson A, Phillips CI. Ovalness of the optic cup and disc in the normal eye. Br J Ophthalmol. 1974 May; 58 (5):543-547. [Europe PMC free article] [Google Scholar] Witusik W. Types of physiological excavation of the optic nerve head. Ophthalmologica. 1966; 152 (1):57-67. [Google Scholar] Woodruff ME We report a case of 42 yrs old male with chief complaint diminution of vision in left eye for 5 months with optic cup disc ratio of right eye 0.6 and left eye 0.8 with inferior focal notching in left eye, temporal pallor both eyes on fundus examination and left homonymous hemianopia on perimetry Optic disc progression was defined as: new or increased neuroretinal rim thinning (2 or more clock hours), notching (1 clock hour or less of thinning of the neuroretinal rim), excavation.

Optic nerve coloboma refers to one of two distinct things: An abnormal optic nerve that is deeply excavated or hollowed out. In some cases, it can also be referred to as an optic nerve pit. The optic nerve is the bundle of nerve fibers that relays the light signals from the eye to the brain. A uveal coloboma that is large enough to. Optic neuropathy and uveo-papillitis Page 106 Papillary oedema Page 107 - Isolated oedema of the papilla without retinal diffusion Page 108 - Oedema of the optic disc with subretinal oedema Page 110 Compression of the optic nerve Page 112 Chiasma impairment Page 114 Amblyopia Page 116 Perinatal impairment of the central nervous system Page 118 Impairment of the central nervous system in adults. Arcuate scotoma.....disc and field must match . If there is an arcuate scotoma there must be a notch. No notch, suspect not glaucoma. Here are the other causes of an arcuate scotomas. Prelaminar optic disc drusen; papilloedema (eg BIH/IIH) laminar ION..ischaemic optic neuropathy, +/- artereritic; optic cana

Optic disc evaluation

Optic Nerve and Retinal Nerve Fiber Imaging - EyeWik

with 9 of them having a notch in the optic cup and 100 of them without any notch in the optic cup. A small value of I indicates that the cup boundary is very close to the disc boundary, and hence is a sign of notching. Based on this parameter, 2 of the 9 notching cases were iden-tied. With the second parameter , 7 out of 9 of cases wit OPTIC NERVE LESION 1. Ischaemic optic neuropathy (both arteritic and non-arteritic types) 2. Papilloedema 3. Optic disc coloboma LESION IN CEREBRAL CORTEX 1. Superior or Inferior calcarine cortex lesion 2. Temporal lobe lesion 3. Parietal lobe lesion 3. Tumours affecting both occipital lobe may produce bilateral superior or inferior altitudinal.

Presence of an optic disc notch and glaucom

Patients with NTG are, on average, 10 years older than those who have POAG. NTG optic discs are more likely to show focal notching, nerve fiber layer hemorrhage and focal paracentral scotomas in the visual field. The pathogenesis of NTG remains unclear. One potential mechanism is vasospasm H47.399 Other disorders of optic disc, unspecified ey... H47.4 Disorders of optic chiasm. H47.41 Disorders of optic chiasm in (due to) inflamm... H47.42 Disorders of optic chiasm in (due to) neoplas... H47.43 Disorders of optic chiasm in (due to) vascula... H47.49 Disorders of optic chiasm in (due to) other d.. Chorioretinal coloboma or optic disc coloboma. At the back of your eye, the retina (the light-sensitive layer) and the choroid (the layer of tissue and blood vessels behind the retina) can be affected by coloboma. This is known as a chorioretinal coloboma Optic cup notching is an important feature in differentiating normal from glaucomatous eyes. The proposed notching detection method comprises four steps: disc and vessel segmentation, vessel bend detection at key regions, feature points selection and automatic classification 2012 ICD-9-CM Diagnosis Codes 377.*. : Disorders of optic nerve and visual pathways. A disorder characterized by swelling around the optic disc. Swelling around the optic disc, usually due to increased intracranial pressure or pressure on the optic nerve by a tumor

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. The outer rim tends to be orange or pink in colour and contains the nerve fibres changes in the optic nerve head (ONH), careful examination of the retinal nerve fibre layer (RNFL) and visual field test. Optic nerve head Classic glaucomatous signs at the ONH include thinning or notching of the neuroretinal rim (NRR), asymmetry of NRR, excavation and enlarged cup to disc ratio over a period of time, Drance Dr Adrian S Bruc A. Evaluate the appearance of the optic cup and neuroretinal rim for signs of glaucoma. 1. Generalized. a. Large optic cup. b. Asymmetry of the cups in the presence of symmetrical disc diameters(See Figure 1) c. Progressive thinning of the neuroretinal rim. 2. Focal. a. Narrowing (notching) of the rim . b. Vertical elongation of the cu Fundus in Glaucoma 1. Glaucoma Fundus in Glaucoma By Dr Bhagyalakshmi K 2. Glaucoma is defined as heterogeneous group of disorders which manifests as chronic progressive optic neuropathy characterized by specific morphological changes at optic nerve head and retinal nerve fibre layer with resultant loss of retinal ganglion cells which results in loss of visual fields

How Glaucoma Affects the Optic Nerve Glaucoma Research

Notching, or loss of fibers in one area of the rim of the optic nerve head, can indicate glaucoma in eyes that may not yet have a large cup-to-disc ratio. Bleeding Visible signs of bleeding on the nerve head in the form of small splinter-like hemorrhages rarely occur in non-glaucomatous eyes referable GON were the presence of vertical cup-to-disc ratio ≥ 0.7, neuroretinal rim notching, retinal nerve fiber layer d efect, and bared circumlinear vessels. Co n c l u s i o n s : A DL algorithm trained on fundus images alone can detect referable GON with higher sensitivity and comparable specificity to eye care providers Early optic nerve head changes may produce a right-left eye asymmetry. An inter-ocular difference in the C/D ratio of ≥ 0.2 is suspicious for glaucoma. Cup to disc (C/D) ratio: The C/D ratio is usually evaluated vertically, in order to detect loss of the superior or inferior NRR. Documented change in the C/D ratio over time is considered a. optic disc pit does not carry any of these systemic associations. In glaucoma evalua-tion, the term 'acquired optic disc pit' has been used to describe deep and total focal notching of the neuroretinal rim,9 partic-ularly in normal tension glaucoma.4 In glaucoma suspects, where the congenital nature of an optic disc pit is equivocal, a The CRA trunk is more commonly nasal-superior and notching tends to occur opposite in the inferior-temporal area Term Why does nerve fiber loss due to glaucoma require a evaluation rim to disk and not just cup to disc ratios

The Advanced Glaucoma Intervention Study (AGIS): 10

The most obvious presentation of a coloboma is as a notch or a gap in some part of the eye, whether that be the iris, the retina, the choroid, or the optic nerve. lens, retina and optic disc In the moderate myopic group optic disc normal appearance was seen in 53.3% myopic fundus picture 7 in 30% and glaucomatous optic nerve head changes in 16.6 %. 8. In the high myopic group 41.6% was found to have glaucomatous optic nerve head change and the most commonly observed optic nerve head changes was the asymmetry of the optic disc cup.

Optic Disc Pallor : Ophthalmoscopic Abnormalities : The

The optic disc is typically round or oval, with a cup in the center. Between the cup and disc margin is the neural rim. Notation of the cup-to-disc ratio is critical, as is the contour of the neural rim. Other signs of damage from glaucoma include hemorrhages near the optic nerve and notching of the neural rim Disc Area range 1.06 - 3.38 mm2 (ave 1.83 mm2) Small - disc area < 1.63 mm2 Medium - disc area 1.63-1.97 mm2 Large - disc area > 1.97 mm2 Larger Discs will have larger c/d ratios Larger Discs generally have greater neuro rim tissue The current software does match disc size for optic nerve parameters but no Vertical cup-to-disc ratio (VCDR), the presence of neuroretinal rim notching, number of clock hours of beta zone parapapillary atrophy (ßPPA), and eye with greater ßPPA width were determined from photographs by 2 masked expert examiners. RESULTS. We identified and analyzed 49 patients with photographically documented unilateral DH The recurring splinter-shaped optic disc hemorrhages in the right eye and neuroretinal rim notching in the left eye corresponding to a segmental defect in the retinal nerve fiber layer and a deep Bjerrum scotoma are characteristics of the focal type of normal-pressure glaucoma. 1 Loss of neuroretinal rim and increase in the β zone of.

Optic disc - Wikipedi

The optic nerve, also known as cranial nerve II, or simply as CN II, is a paired cranial nerve that transmits visual information from the retina to the brain.In humans, the optic nerve is derived from optic stalks during the seventh week of development and is composed of retinal ganglion cell axons and glial cells; it extends from the optic disc to the optic chiasma and continues as the optic. So there are five R's of any optic disc evaluation. This first we measure the scleral ring. Then comes the neural retinal rim. Then comes the retinal nerve fibre layer. Then the retinal or the optic disc hemorrhages and then the region of perippillary attrophy. Now many of you all won't understand what these terms are and what they look like

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