No abstract available.
Optic Nerve Injuries* ; Optic Nerve*

To compare the effect of centrally aligned image acquisitions with that of roughly centered image acquisitions on the reproducibility of topographic parameters obtained with the Heidelberg Retina Tomograph. three optic nerve head images were acquired sequentially by the rough centration of live image on the monitor, after then another three images sequentially by the central alignment in five healthy eyes of five subjects. For the centrally aligned image acquisitions, the contour of the frozen live optic nerve head image of each eye was copied into the transparent film. The images were acquired when the margin of live image fitted the contour line on the film. The reliability coefficients of the parameters ranged from 59.4% to 98.2% by the rough centration and 89.7% to 98.7% by the the central alignment. The results indicate that centrally aligned image acquisition provide highly reproducible topographic data of optic nerve head.
Optic Disk* ; Optic Nerve* ; Retina*

No abstract available.
Gadolinium* ; Optic Nerve Diseases ; Optic Nerve Injuries*

No abstract available.
Gadolinium* ; Optic Nerve Diseases ; Optic Nerve Injuries*

Traumatic optic neuropathy (TON) refers to optic nerve injury resulting from direct and indirect head and facial trauma. The pathogenesis of indirect TON has not been fully elucidated, and the management of TON remains controversial. In this review article, I review the recent literature regarding TON and discuss how to manage indirect TON.
Head ; Optic Nerve ; Optic Nerve Injuries*

Orbital meningioma is relatively rare. A case of intraorbital meningioma arising from optic nerve sheath is presented, which extended intracranially through the optic canal. Transfrontal intradural and extradural approach under the operating microscope is the best successful exposure for the orbital meningioma when there is suspected intracranial extension of the tumor.
Meningioma* ; Optic Nerve ; Orbit*

No abstract available.
Adenocarcinoma* ; Optic Nerve*

The examination of the optic nerve is an important part of every examination of the fundus. In attempting to determine weather or not a pathologic process is present, it is essential that the normal disk and its varitions, as well as the congenital anomalies, be thoroughly understood. For this reason the major portion of this study will be devoted to the normal disk shape and its congenital variations.
Optic Nerve ; Weather

The diagnosis of retroorbital tumor is at times difficult and the decision as to the best surgical approach to orbital tumors is often difficult. The rapid development of diagnostic radiologic procedures has provided a means of more precisely defining the nature and extent of the lesion and with the advent of microsurgical techniques, they could allow safe access to the orbit transcranially. The advantage of the transcranial approach to orbital tumors is apparent for disease processes that arise in or extend to the intracranial cavity, and superior access to the apical portion of the optic nerve and to the medial and lateral superior quadrants of the orbit. Furthermore, good functional and cosmetic outcome is possible. The authors had experienced good results of transcranial approach in 15 cases of retroorbital tumors.
Diagnosis ; Optic Nerve ; Orbit

No abstract available.
Optic Nerve Injuries* ; Orbit*