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| | Kabat Disc |
 | | The exact mechanism responsible for optic nerve head hypoplasia is not completely understood, but the condition is believed to represent a dysplasia of the retinal ganglion cells with associated loss of the nerve fiber layer. | | | Optic nerve head hypoplasia is a congenital condition involving the outer retinal layers. | | | The disc in CFD displays no physiologic cup, and the neural rim tissue remains pink in color, although the nerve head may be judged to be slightly hyperemic. |
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http://www.opt.pacificu.edu/ce/catalog/COPE7536/KabatDisc.html
(4302 words)
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| | Stoebner |
| | Optic neuritis is characterized by an acute loss of vision, often associated with retrobulbar pain with eye movement. | | | Optic nerve sheath decompression is the second form of surgery used in the management of patients with severe vision loss from papilledema(ibid). | | | Optic Neuritis Study Group: The clinical profile of acute optic neuritis: Experience of the Optic Neuritis Treatment Trial. |
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http://www.opt.pacificu.edu/ce/catalog/web016/course.htm
(4066 words)
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| | Optometric Management |
| | In the optic nerve head analysis for the left eye, I noted a substantial optic disc drusen-related elevation in each meridian of the optic nerve scan. | | | The right disc revealed cup-to-disc (C/D) ratio of 0.25H/0.2V, with minimal cup depth and clear neuroretinal rim tissue; an isolated ODD was visually noted deep in the optic disc tissue at the five o'clock position. | | | Optic disc drusen (ODD) are hyaline bodies retained within the anterior optic nerve head structure. |
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http://www.optometric.com/article.aspx?article=71178
(1428 words)
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| | Optic Nerve Diseases for medical students and primary care physicians |
| | Optic Nerve Diseases for medical students and primary care physicians | | | On the temporal side, the cup to disc ratio is bigger and can mimick glaucomatous cupping. | | | Retrobulbar pain, especially on ocular movement, early central scotoma,decreased acuity.impaired color vision, |
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http://www.eyeweb.org/optic_nerve.htm
(540 words)
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| | Neuro-opthalmology Lecture - Digre |
| | There are mimics of optic atrophy including large physiologic cups with exposure of the lamina cribrosa, and sloping ectatic discs. | | | The disc can be "cupped out" in response to the damage--this just means that there is profound loss of tissue. | | | · Glaucoma is a kind of optic neuropathy associated with progressive cupping of the optic disc due to increased intraocular pressure. |
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http://www-medlib.med.utah.edu/neuronet/no/digre2.html
(3145 words)
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| | optic-coloboma.html |
| | CONCLUSION: Central visual acuity in children born with colobomas involving the optic nerve correlates with the development of normal foveal anatomy, regardless of the size of the coloboma, the color of the optic nerve, or the presence of subfoveal pigmentary changes. | | | In particular, colobomatous dysplasia and hypoplasia of the optic nerve seem to be typical of hydrolethalus syndrome. | | | TI: Optic nerve aplasia associated with macular 'atypical coloboma'. |
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http://www.indiana.edu/~pietsch/optic-coloboma.html
(8213 words)
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| | North American Neuro-Ophthalmology Society-Committees |
| | This is a small "stroke" in the optic nerve but unlike other strokes is unassociated with weakness, numbness, or loss of speech, nor is there an increased risk of a classic stroke later. | | | A recent study suggests that 40% of patients may expect to have some improvement in central vision. | | | This seems to be a risk factor that has been present from birth. |
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http://www.nanosweb.org/patient_info/brochures/aion.htm
(1174 words)
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| | Optic atrophy |
| | Nutritional deficiencies and poisons can be associated with gradual vision loss and optic atrophy, or with sudden vision loss and optic disc swelling. | | | This change in visual function can be a decrease in sharpness and clarity of vision (visual acuity) or decreases in side (peripheral) vision. | | | This increased pressure may eventually affect the optic nerve if left untreated. |
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http://www.healthatoz.com/healthatoz/Atoz/ency/optic_atrophy.jsp
(1227 words)
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| | eMedicine - Optic Neuropathy, Anterior Ischemic : Article by Brian R Younge, MD |
| | The Ischemic Optic Neuropathy Decompression Trial Research Group: Optic nerve decompression surgery for nonarteritic anterior ischemic optic neuropathy (NAION) is not effective and may be harmful. | | | Early observations of optic disc photographs suggested that patients with small discs having smaller or nonexistent cups have an anatomic predisposition for NAION. | | | Surgical Care: Optic nerve fenestration was advocated for AION until the completion of the Ischemic Optic Neuropathy Decompression Trial (IONDT). |
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http://www.emedicine.com/oph/topic161.htm
(3873 words)
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| | eMedicine - Pseudopapilledema : Article by Joseph Giovannini, MD |
| | Disc drusen may autofluoresce on fluorescein angiography, which can be seen with red-free photo techniques, using the appropriate filters. | | | A minority of patients with disc drusen experience transient visual flickering or graying out that is similar to transient visual obscurations that are sometimes seen in patients with papilledema. | | | The optic cup may be smaller than usual in a hyperopic eye. |
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http://www.emedicine.com/oph/topic615.htm
(1480 words)
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| | Review of Ophthalmology |
| | Assessment of the optic nerve head’s color is crucial in determining the etiology of the optic neuropathy. | | | This arbitrary classification is based on studies that have documented normal C/D ratios ranging from less than 0.3 (66 percent of normal individuals) to greater than 0.5 (only 6 percent of normal individuals). | | | The extent of optic-disc cupping is normally symmetric between a patient’s eyes, and thus, I take note of any significant asymmetry in the cupping. |
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http://www.revophth.com/index.asp?page=1_737.htm
(2096 words)
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| | Ophthalmology Management |
| | Although most of these differences can be explained by variation in optic disc area, adjusted analysis found that some were independent of this factor. | | | Whether we examine patients subjectively with the slit lamp or with objective imaging devices, we need to detect subtle glaucomatous changes in the optic nerve head and the peripapillary retina in the earliest stages. | | | This is an important question, not only for clinical ophthalmologists, but also for those who assemble normative data for diagnostic imaging devices. |
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http://www.ophmanagement.com/article.aspx?article=86390
(860 words)
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| | Physicians & Students/ Papilledema |
| | It is useful to characterize the changes in the optic nerve head that occur in papilledema as being mechanical or vascular in nature. | | | However, further injury to the optic nerve may be associated with secondary optic atrophy and | | | Less commonly, the patient may describe blurred vision, constriction of visual fields, dyschromatopsia, and/or diplopia. |
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http://www.eyeweb.org/papilledema.htm
(263 words)
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| | New Page 2 |
| | The position of the cup is central or slightly temporal | | | What are the considerations when you do not get red reflex? | | | When the optic cup is wider and deeper than normal, it is considered abnormal. |
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http://www.meddean.luc.edu/lumen/MedEd/medicine/pulmonar/pdself/fundus.htm
(388 words)
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| | Optic Nerve Hypoplasia |
| | Borchert and his team are currently researching the cause of optic nerve hypoplasia and other optic nerve disorders. | | | Handbook of Ocular Disease Management - Optic Nerve Hypoplasia | | | To date she sees just color forms and little else. |
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http://www.lowvision.org/optic_nerve_hypoplasia.htm
(186 words)
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| | Optic disc |
| | In people with glaucoma, nerve fibers die, making the edge of the nerve tissue inside the optic disc thinner. | | | The inner part of the optic disc is a depression called the optic cup. | | | The optic disc is the point inside the eye where the nerve that leads from the eye to the brain (optic nerve) leaves the eye. |
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http://www.webmd.com/hw/health_guide_atoz/sto167603.asp
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| | Ophthalmic Surgery, Lasers and Imaging |
| | Parul Sony, MD; Viney Gupta, MD Doubling of the optic disc is a rare clinical entity. | | | From the Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All-India Institute of Medical Sciences, New Delhi, India. | | | The right eye was microphthalmic, with an inferonasal iris coloboma, a large chorioretinal coloboma involving the macula, and visual acuity of counting fingers close to the face. |
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http://www.osli.com/showAbst.asp?thing=9271
(188 words)
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| | Optic Nerve - Eye anatomy |
| | The optic nerve transmits electrical impulses from the retina to the brain. | | | When examining the back of the eye, a portion of the optic nerve called the optic disc can be seen. | | | The retina's sensory receptor cells of retina are absent from the optic nerve. |
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http://www.stlukeseye.com/anatomy/OpticNerve.asp
(89 words)
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| | Congenital |
| | Sever hypoplasia of the optic disc is often associated with a visual defect | | | Patients with dominant optic atrophy have the insidious onset of mildly progressive loss of visual acuity, usually beginning before 10 years of age. | | | Visual loss is bilateral but may be asymmetric, The characteristic field defect is a cecocentral scotoma.May simulate a bitemporal hemianopia,, Dyschromatopsia is the characteristic color defect in dominant optic disc atrophy. |
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http://www.yemenweb.com/algorafi/new_page_1.htm
(219 words)
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