Slow Potentials and Microprocessor Applications: Proceedings of the 20th I.S.C.E.V. Symposium Iowa City, Iowa, U.S.A., October 25-28, 1982

Investigators and clinicians researching and applying electrophysiologic phenomena of the eye, met for the XXth Symposium of the International Society for Clinical Electrophysiology of Vision in Iowa City, Iowa, under the auspices of the University of Iowa and supported by the Department of Ophthalmology, headed by Professor Frederick C. Blodi. Two main topics were discussed: I) Electro-oculography and other slow potentials: the phenomenon, origin, analysis, and clinical diagnosis, and 2) Microprocessor applications for computer-assisted recording and analysis of electro visual phenomena. Unusual and challenging diagnostic problems were presented during one evening session. The interest and lively audience participation indicated a need for such an unrehearsed debate. Drs. H.W. Skalka, H. Nakano, H.S. Thompson, A.J. Packer, J.A. Parker, H.E. Kolder, V.M. Hermsen, M.L. Wolf, and Mr. A.1. Mallinson presented case reports and are herewith recognized for their contribution. No documentation is contained in the Proceedings. Several papers were read outside the main topics. Some material appears only as abstract. The highlight of the scientific program proved to be an improvised session on basic mechanisms of slow potentials from the eye. Dr. R.H. Steinberg and his collaborators, together with Dr. G. Niemeyer initiated this part of the program. It was enthusiastically received, provided an informal atmosphere, stimulated a lively discussion and exchanged pro­ found information. A novel feature of this volume is the addition of a cumulative index covering the Proceedings from the last ten ISCERG-ISCEV Symposia. Dr. Front Matter....Pages I-XV The Cellular Origin of the Light Peak....Pages 1-11 The Cellular Origin of the Fast Oscillation....Pages 13-20 Variations of c-Wave Amplitude in the Cat Eye....Pages 21-28 Hyperosmolarity-Induced Changes in the Transepithelial Potential of the Human and Frog Retinae....Pages 29-33 EOG and Experimental Optic Nerve Transection....Pages 35-40 Light Modulation of the Standing Potential in the Perfused Mammalian Eye: Characteristics and Responses to Acidosis....Pages 41-49 Changes in the Electroretinogram of Albino Rabbits after Intravitreal Injection of DL-α-Aminodipic Acid....Pages 51-56 The Canine c-Wave: Breed and Anesthetic-Dependent Variations....Pages 57-64 Electroretinogram Below b-Wave Threshold in the Cat: Studies of Retinal Development and Retinal Degeneration....Pages 65-72 Origin of the Fast Oscillation in the Macaque....Pages 73-73 Increment Threshold Function of the Light-Induced Slow Oscillation of the EOG....Pages 75-80 Corneoretinal Potentials in Human Infants....Pages 81-86 EOG Driven by the Contralateral Reading Eye....Pages 87-91 The Electrooculogram in ‘Vitelliform’ Macular Lesions....Pages 93-103 EOG Changes in Dominantly Inherited Drusen (Malattia Leventinese)....Pages 105-113 EOG Application for Stargardt’S Disease and X-Linked Juvenile Retinoschisis....Pages 115-120 Hydroxychloroquine and Retinal Toxicity....Pages 121-126 EOG Changes Due to Spontaneous Macular Pucker....Pages 127-130 The Fast Oscillation of the Electro-Oculogram, Amplitudes and Latencies in the Course of the Slow Oscillation....Pages 131-135 The Fast Oscillation of the Electro-Oculogram in Sectorial Retinitis Pigmentosa....Pages 137-141 Changes of the Fast Oscillations in Diabetic Retinopathy and Use of a New Computerized EOG Device....Pages 143-150 Variability of the Human C-Wave....Pages 151-157 What Does the c-Wave Tell Us in Retinal Diseases?....Pages 159-167 ERG c-Wave at the Early Stage of Diabetic Retinopathy....Pages 169-174 The EOG and the ERG in the Aortic Arch Syndrome....Pages 175-179 Slow Retinal Potentials Evoked by Patterned Stimuli....Pages 181-187 Data to the Electro-Oculography of Retrolental Fibroplasia....Pages 189-189 The Long-Term Observation of the ERG c-Wave and EOG in Cases of Postoperative Retinal Detachment....Pages 191-191 Interactive Computer Program for Clinical Electrophysiology....Pages 193-197 Use of Microcomputers to Acquire Electrophysiological Data: Description of A Commercially Available System in Operation....Pages 199-207 Implementation of a Portable Pattern Stimulator and VEP/ERG Recording System Based on an Apple Microcomputer....Pages 209-216 Microcomputer Presentation of Patterned Stimuli for Visual Electrophysiology....Pages 217-224 Microcomputer Technique for Identification of Electrical Biopotentials Transmitted along the Optical Pathways....Pages 225-230 Computer-Assisted Analysis of Clinical Electroretinographic Intensity-Response Functions....Pages 231-239 Dynamic Random-Element Stereograms: A Microprocessor Application....Pages 241-245 Digital vs Analog Filtering of Electrophysiological Data Utilizing Microprocessors....Pages 247-252 A Microprocessor-Aided Trichromatic Illuminometer Based on General Principles of Retinal Circuitry....Pages 253-253 The Distinction between Luminance and Spatial Contrast Components in the Pattern ERG....Pages 255-264 Human Pattern Evoked Retinal Response (PERR): Spatial Tuning and Development....Pages 265-271 Pattern Reversal Electroretinograms in Squint Amblyopia, Artificial Anisometropia and Simulated Eccentric Fixation....Pages 273-278 Pattern-Reversal Electroretinograms in Unilateral Glaucoma....Pages 279-285 Retrolental Fibroplasia and ERG....Pages 287-291 On the Recovery of the Electroretinogram of Intravitreal Iron Particles....Pages 293-299 Electrophysiological and Clinical Findings after Acute Chloroquine Poisoning....Pages 301-307 Synchronization of ERG Signs of Retinal Ischemia....Pages 309-315 The Action of Opiates on the Oscillatory Potentials of the Electroretinogram (Erg)....Pages 317-323 ERG ‘C’-Wave as Elicited Using Fast Random Stimuli....Pages 325-332 Fast Random and Slow Regular Stimulus ERG’s in Rabbits after Dilatation with Cyclogel and after Sodium Iodate Injection: A Preliminary Study....Pages 333-342 A New Disposable ERG Electrode Utilizing a Hydrophilic Soft Contact Lens with High Water Content....Pages 343-343 The Erg in Retinitis Pigmentosa....Pages 345-345 Alterations in the Photopic ERG and Optic Atrophy/Dysplasia in Congenital Stationary Nightblindness....Pages 347-347 Supernormal Scotopic ERG in Macular Dystrophy....Pages 349-349 ERG Amplitude and Latency Changes During Early Diabetes Mellitus in Rats....Pages 351-351 Luminance Effects on Latency and Topography of Average Pattern-Evoked Potentials....Pages 353-360 Oculomotor Behavior in Human Albinos....Pages 361-372 Pattern VECP Topography to Right and Left Half Field....Pages 373-381 Vector Analysis of Pattern VEP of Patients with Hemianopia....Pages 383-390 Early/Late Component Ratio in Pattern-Reversal VEP: Normative Data and Clinical Applications....Pages 391-400 Cortical vs Sub-Cortical Components of the Pattern VEP....Pages 401-408 Studies on Visual Learning Gain by Means of VEP’s....Pages 409-415 Pattern Evoked Potential Latency as Indicator of Early and Delayed CNS Changes Due to Antileukemia Treatment in Children....Pages 417-423 Clinical Application of Hypnotic-Influenced VEP....Pages 425-432 Complex Structured Stimuli for VECP....Pages 433-433 Asymmetries of VECP Scalp Distribution Evoked by Nasal and Temporal Hemiretinal Stimulation in Esotropic Patients....Pages 435-435 The Visual Electrically Evoked Potential (VEEP): Steady State Responses....Pages 437-437 Notes on Fourier Methods in Vision Research....Pages 439-452 An Electronically-Induced Pulfrich Illusion as a Quantitative Measure of Visual Delay and Stereopsis....Pages 453-461 Eye Tracking Performance and Attention in Psychotic Patients....Pages 463-470 Chromatic Stimulation in Partial Achromatopsia....Pages 471-471 Back Matter....Pages 473-502