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Die Funktionsprufung bein dichten Medientrubungen des Auges.
VOL. 76, NO. S
BOOK REVIEWS
glass rods. The application should be as far back as possible and the patient has to look into the opposite direction. Another method to test the visual field is by transscleral illu mination. For this purpose any transilluminator can be used in a dark room. Other methods include the entoptic Purkinje phe nomenon which demonstrates a network of shadows produced by the retinal vessels on the transsclerally illuminated fundus. An other method consists of illuminating the eye with a band of light (as for instance pro duced by a Maddox cylinder) and then let ting the patient indicate the direction of the band. 3. The central visual acuity: The entoptic phenomenon of the macular chagrine can best be produced by the euthyscope or a hand-held, direct ophthalmoscope. Good vis ualization of the macular chagrine usually indicates good macular function. The central visual acuity can also be tested by using the Haidinger brushes. Best suited for this test is the Cueppers coordinator which rotates the polarizing filter about 60 times per min ute. This phenomenon, however, is extin guished by any yellowish or brownish discol oration such as a nuclear cataract, blood, or corneal scars. A third method, which gives
861
promise for the future, is the use of laser for the production of interference patterns. All in all this is a useful monograph on an important subject. Frederick C. Blodi
SYMPOSIA CAUSES AND PREVENTION OF BLINDNESS.
Edited by I. C. Michaelson and E. R. Berman. New York, Academic Press Inc., 1972. Cloth-bound, 656 pages, table of con tents, preface, summaries, author index, subject index, black and white illustrations. $11.00 The report was previously circulated as the August-September 1972 number of the Israel Journal of Medical Sciences (vol. 8: No. 8-9, 1972). Major sections include pub lic health ophthalmology, clinical problems in developed countries, basic laboratory studies, and analysis of prevention possibilities. This is an extremely well-balanced discussion of current research and clinical problems. All ophthalmologists are certain to find consider able material of interest. Frank W. Newell
BOOK REVIEWS
glass rods. The application should be as far back as possible and the patient has to look into the opposite direction. Another method to test the visual field is by transscleral illu mination. For this purpose any transilluminator can be used in a dark room. Other methods include the entoptic Purkinje phe nomenon which demonstrates a network of shadows produced by the retinal vessels on the transsclerally illuminated fundus. An other method consists of illuminating the eye with a band of light (as for instance pro duced by a Maddox cylinder) and then let ting the patient indicate the direction of the band. 3. The central visual acuity: The entoptic phenomenon of the macular chagrine can best be produced by the euthyscope or a hand-held, direct ophthalmoscope. Good vis ualization of the macular chagrine usually indicates good macular function. The central visual acuity can also be tested by using the Haidinger brushes. Best suited for this test is the Cueppers coordinator which rotates the polarizing filter about 60 times per min ute. This phenomenon, however, is extin guished by any yellowish or brownish discol oration such as a nuclear cataract, blood, or corneal scars. A third method, which gives
861
promise for the future, is the use of laser for the production of interference patterns. All in all this is a useful monograph on an important subject. Frederick C. Blodi
SYMPOSIA CAUSES AND PREVENTION OF BLINDNESS.
Edited by I. C. Michaelson and E. R. Berman. New York, Academic Press Inc., 1972. Cloth-bound, 656 pages, table of con tents, preface, summaries, author index, subject index, black and white illustrations. $11.00 The report was previously circulated as the August-September 1972 number of the Israel Journal of Medical Sciences (vol. 8: No. 8-9, 1972). Major sections include pub lic health ophthalmology, clinical problems in developed countries, basic laboratory studies, and analysis of prevention possibilities. This is an extremely well-balanced discussion of current research and clinical problems. All ophthalmologists are certain to find consider able material of interest. Frank W. Newell