نتایج جستجو برای: optic disc duplication

تعداد نتایج: 106640  

Journal: :بینا 0
عباس باقری a bagheri ocular tissue engineering research center, shahid beheshti university of medical sciences, tehran, iranمرکز تحقیقات مهندسی بافت چشم- دانشگاه علوم پزشکی شهید بهشتی- تهران- ایران رضا جعفری r jafari mazandaran university of medical sciences, sari, iran; 3ophthalmic research center, shahid beheshti university of medical sciences, tehran, iranدانشگاه علوم پزشکی مازندران- ساری- ایران محدثه فیضی m feizi mazandaran university of medical sciences, sari, iran; 3ophthalmic research center, shahid beheshti university of medical sciences, tehran, iranمرکز تحقیقات چشم- دانشگاه علوم پزشکی شهید بهشتی- تهران- ایران

purpose: to report a case who had optic disc duplication, a rare congenital disorder characterized by two well-defined discs in one eye. case report: a 19 months-old child presented with unilateral epiphora in the right eye since birthday. the right eye was smaller than the left eye and mild ptosis was apparent. nasolacrimal duct probing was performed under general anesthesia. the examination r...

Journal: :The British journal of ophthalmology 2005
N Islam J Best J S Mehta S Sivakumar G T Plant W F Hoyt

AIM To describe lesions resembling optic disc duplication and highlight their unusual visual fields. The authors also report the first case of pseudo-duplication of the optic disc with overlying retinal nerve fibre layer. METHODS Retrospective, non-comparative review of case notes. Humphrey visual fields and OCT-3 imaging were performed. RESULTS All 11 cases represented peripapillary chorio...

Journal: :British Journal of Ophthalmology 2005

Journal: :The British journal of ophthalmology 1999
G G Kamath S Prasad Y J Patwala M T Watts

EDITOR,—Doubling of the optic disc is rare and can manifest as true or pseudo doubling. A 64 year old man was referred by his physician who noted “a clear area between each optic disc on both sides” during a routine check. Visual acuities and anterior segments were normal. Funduscopy revealed an appearance simulating double optic discs on each side. The right eye showed a 2 disc diameter (DD) s...

2018
Nimrod Dar Alexander Rubowitz

Purpose To report a unique case of pseudo-duplication of the optic disc with maculo-schisis. Observations A 9-year-old girl presented with decreased vision in the left eye. Her measured visual acuity was 20/50. Dilated fundus examination revealed an optic disc-like lesion with a large crater-like depression, pale color and aberrant retinal vasculature arising from its lower region. Optical co...

Accurately detection of retinal landmarks, like optic disc, is an important step in the computer aided diagnosis frameworks. This paper presents an efficient method for automatic detection of the optic disc’s center and estimating its boundary. The center and initial diameter of optic disc are estimated by employing an ANN classifier. The ANN classifier employs visual features of vessels and th...

Journal: :مجله دانشگاه علوم پزشکی شهید صدوقی یزد 0
محمدرضا شجاع mr shoja منیژه مهدوی m mahdavi

purpose: to report a case of unilateral severe visual loss and bilateral optic disc cupping secondary to brain metastasis of bronchogenic carcinoma patient and findings: a 48 year-old woman presented with severe visual loss of left eye without redness or pain or any systemic findings .clinical findings included decreased visual acuity of left eye to 4 m cf and (+3) positive marcus-gunn reflex ....

Journal: :journal of current ophthalmology 0
مسعود ناصری پور masood naseripour پژمان بختیاری pejman bakhtiari شبنم سلیمی shabnam salimi محسن بهمنی کشکولی mohsen bahmani-kashkouli علیرضا صادقی پور alireza sadeghipour

purpose : to report a rare case of large vascularized astrocytoma on optic disc. case report : a 12-year-old boy with history of decreased vision in the left eye since 5-6 months ago was referred to the ocular oncology service at rassoul akram hospital with provisional diagnosis of retinoblastoma. on examination, visual acuity was counting fingers at 50 cm, and a 3+ relative afferent pupillary ...

Journal: :journal of medical signals and sensors 0
mina jamshidia hossein rabbani zahra amini raheleh kafieh abbas ommani vasudevan lakshminarayanand

localizing the optic disc (od) in retinal fundus images is of critical importance, since it is very similar to hard exudates (found in pathology) in color and brightness. because of the importance of od localization in clinical applications, many techniques have been developed. in this paper, we present the results obtained from two methods, correlation and least square, to approximate the opti...

Journal: :iranian journal of neurology 0
anahid safari clinical neurology research center, school of medicine, shiraz university of medical sciences, shiraz, iran. esmail jafari department of ophthalmology, division of corneal disease, school of medicine, iran university of medical sciences, tehran, iran. afshin borhani-haghighi department of neurology, school of medicine and clinical neurology research center, shiraz university of medical sciences, shiraz, iran.

morning glory syndrome (mgs) is a rare congenital optic disc anomaly characterized by a funnel-shaped, excavated optic disc surrounded by chorioretinal pigmentary disturbance. the main ophthalomoscopic feature of the mgs is enlarged optic disc with a funnel shaped scleral defect; elevated peripapillary chorioretinal pigmentation; and pale fluffy tissue of glial hyperplasia overlying the optic d...

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