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Show LITERATURE ABSTRACTS 73 mus from spasmus nutans. Unfortunately, their criteria cannot be used to distinguish true spasmus nutans and spasmus nutans- like disease, in other words, disease associated with other pathology such as chiasmal glioma. Lyn A. Sedwick, M. D. Efficacy of Prism Adaptation in the Surgical Management of Acquired Esotropia. Prism Adaptation Study Research Group. Arch Ophthalmol 1990; 108: 1248- 56 ( Sept). [ Reprint requests to Dr. Connett, University of Minnesota, Coordinating Centers for Biometric Research, Suite 200,2221 University Ave S. E., Minneapolis, MN 55414.] This study of about 300 patients with acquired esotropia who were at least 3 years of age suggests that presurgical treatment of the patient, using prisms to try to achieve fusion, will result in a moderate improvement ( 83% versus 72%) in surgical outcome. Presumably, the prism adaptation brings out a larger angle of strabismus than initially detected, and operating for the larger angle results in fewer undercorrections. Lyn A. Sedwick, M. D. Disc Swelling in an Adult Diabetic Patient. Katz B, Sedwick LA, Slavin M, Wall M. Surv Ophthalmol 1990; 35: 158- 63 ( Sept- Oct). [ Reprint requests to Dr. B. Katz, Department of Ophthalmology, Pacific Presbyterian Medical Center, 2340 Clay Street, San Francisco, CA 94120.] The case for discussion is a 58- year- old woman with adult- onset diabetes mellitus who presented initially with bilateral mild disc edema and mild visual dysfunction. Work- up gave normal scanning ( computerized tomographic and magnetic resonance) and lumbar puncture. With follow- up her disc edema worsened and repeat lumbar puncture gave an elevated opening pressure. The discussion centers on the differential diagnosis of diabetic papillopathy and papilledema. Lyn A. Sedwick, M. D. A Model for the Mechanism of Optic Nerve Sheath Fenestration. Seiff SR, Shah L. Arch Ophthalmoll990; 108: 1326- 9 ( Sept). [ Reprint requests to Dr. S. R. Seiff, Department of Ophthalmology, K- 301, University of California, San Francisco, San Francisco, CA 94143.] The authors set up an experimental system with a 1,900- cm3 bottle with two tubes simulating the optic nerves, which communicated with the bottle via a " y" connection simulating the chiasm. The authors opened a clamp on one " optic nerve" tube and showed a great reduction of pressure in that tube, a lesser reduction in the other optic nerve tube, and only a minimal reduction of pressure in the bottle which was not sustained upon addition of further fluid to the bottle. They relate their findings to actual observed phenomena in pseudotumor cerebri and optic nerve sheath fenestration. They postulate that all of this is predicted by Bernoulli's equation of fluid dynamics. Lyn A. Sedwick, M. D. Magnetic Resonance Imaging of Radiation Optic Neuropathy. Zimmerman CF, Schatz NJ, Glaser JS. Am JOphthalmol1990; 110: 389- 94 ( Oct). [ Reprint requests to Dr. C. Zimmerman, Department of Ophthalmology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75235- 9057.] The authors report three patients with periorbital or sella radiation who developed visual loss felt to be secondary to radiation optic neuropathy. In two patients, magnetic resonance imaging showed enhancement of the optic nerve( s) with gadolinium used. In the third case, contrast was not used, but the optic nerves appeared enlarged and presumably edematous, and returned to a normal size with time. Lyn A. Sedwick, M. D. Facial Nerve Injury and Hemifacial Spasm. Frueh BR, Preston RA, Musch DC. Am J Ophthalmol 1990; 110: 421- 3 ( Oct). [ Reprint requests to Dr. B. Frueh, W. K. Kellogg Eye Center, 1000 Wall Street, Ann Arbor, MI 48105- 1994.] The authors reviewed records of 67 patients with hemifacial spasm. Using several parameters of seventh nerve function, the authors concluded that seventh nerve weakness commonly accompanies hemifacial spasm. Lyn A. Sedwick, M. D. / '. J Clin Neuro- ophthalmol, Vol. 11, No. 1, 1991 |
