| OCR Text |
Show !oumal of Clinical Neuro-ophthalmology 13(1): 14. 1993. Editorial Comment © 1993 Raven Press, Ltd .. New York Sudden Visual Field Constriction Associated With Optic Disc Drusen The article by Moody, Irvine, Cahn, et aL describes two patients who experienced sudden constriction of the visual field of one eye associated with preservation of visual acuity in the setting of impressive drusen of the optic disc. The authors emphasize that it is unlikely that anterior ischemic optic neuropathy was responsible. We have had a similar case. A 75-year-old woman with longstanding disc drusen experienced sudden visual field loss in one eye. The fundus was otherwise normaL There was neither retinal edema, as would be expected with branch artery occlusion, nor disc swelling, as would be expected with anterior ischemic optic neuropathy. We too had no clear-cut explanation for the visual loss. A form of retrobul- 14 bar optic neuropathy is possible, but how drusen located in the laminar or prelaminar regions would cause this is unclear. Similarly, there could be some type of effect on ocular perfusion of the retina, causing a generalized hypoperfusion, most marked in the periphery and midperiphery. We did not perform electrophysiologic studies on our patient, but I wonder what an ERG would show. In any event, I agree with the authors that this condition occurs, and I share their confusion regarding the etiology. Neil R. Miller, M.D. Baltimore, Maryland |
