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macular edema in the first week after cataract extraction. Unpublished data from our clinic confirm the 30 to 50% incidence of cystoid macular edema four to six weeks after cataract extraction which has been reported by Hitchings and Chisholm1 and by other investiga tors. These two different groups of data, when considered together, have led us to conclude that an indirect, perhaps humorally mediated, cause of cystoid macu lar edema must be considered. Dr. Hesse implies, also, that hypotony can predispose to cystoid macular edema. We are aware of no data supporting this view. RICHARD M. KLEIN, M.D. LAWRENCE YANNUZZI, M.D.
New York, New York Reference 1. Hitchings, R. A., and Chisholm, I. H.: Inci dence of aphakic macular edema. Br. J. Ophthalmol. 59:444, 1975.
BOOK REVIEWS Photocoagulation in Retinal Vein Occlu sion. By S. C. Sedney. The Netherlands, Dr. W. Junk Publishers, 1976. Paperbound, 250 pages, table of contents, 42 black and white figures. $26.25 This well-organized thesis carefully doc uments and evaluates current evidence and opinion on the natural course, seque lae, and treatment of tributory and central retinal vein occlusion. The author also analyzes in detail 164 of his own cases with retinal vein occlusion accumulated over a four-year period, and contrasts the various merits of anticoagulation, carbogen inhalation, and photocoagulation as therapeutic modalities. Encour aging results are reported after photo-
DECEMBER, 1976
coagulation in tributory vein occlusion and guidelines are advanced as to its use in the treatment of secondary macular edema and vitreous hemorrhage. The re sults, however, should be viewed in the light of the relatively small numbers pre sented and the absence of randomized controls. The author presents a comprehensive review of published reports relating to tributory and central retinal vein occlu sion and includes a detailed bibliogra phy, certainly the most complete on these subjects to date. The material is well displayed, aptly illustrated by appropri ate color photographs and fluorescein angiograms, and detailed with numerous case reports. This volume will interest all ophthal mologists engaged in clinical practice and has special appeal to those investigators evaluating the place of photocoagulation in the treatment of retinal vein occlusion. DESMOND ARCHER
Les Vertiges. Données fondamentales et cliniques sur l'équilibration. By W. J. Oosterveld, J. James, J. Th. F. Boeles, J. J. Groen, L. B. W. Gongkees, and A. J. M. Van Vliet. Paris, Doin, Editeurs, 1976. Paperbound, 208 pages, index, 46 black and white figures. $14.48 This monograph on vertigo deals with the problems of equilibrium on a general basis. After a description of the relevant anatomy, the discussion of examination techniques includes a section on nystagmography that is particularly noteworthy for displaying a variety of ocular move ments in several disease states. At a glance, it is possible to view the differen tial nystagmographic tracings elicited in patients with congenital nystagmus, pos terior fossa lesions, disturbances of the vestibular nuclei, and the effects of basilar impression.