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The proceedings of the twelfth symposium of the International Society for Clinical Electroretinography (ISCERG) are published as a handsome, soft-bound volume with high quality of printing. It is regrettable that ISCERG cannot attract a larger audience, because its meetings are well organized, of practical importance, and unsurpassed as a collection of clinical expertise in ophthalmic electrodiagnosis. The published proceedings of previous ISCERG meetings compile the most valuable single source for clinical information on electroretinography (ERG), electro-oculography (EOG), and visual evoked response. These books are difficult to obtain. The organizers' efforts to make the publication timely and attractive for a larger group deserve wholehearted support. Forty-four contributions are presented on 415 papers—all information, no trim. Many remarkable facts are reported. A few shall be mentioned because they have since been recognized as fundamental, but the selection is arbitrary: ERG and EOG in bull's eye maculopathy by Henkes et al; contralateral effect