The chapters in this volume are drawn from the presentations delivered
at a symposium on Developmental Disabilities in the Preschool Child.
This sym- posium was held under the auspices of The Institute for
Pediatric Service of Johnson and Johnson Baby Products. It was
co-sponsored by The College of Medicine and Dentistry of New Jersey,
Rutgers Medical School, and The In- stitute for the Study of Exceptional
Children, Educational Testing Service. The symposium was held in the
Fall of 1979 in Chicago, Illinois and the participants, including Ph. D
. 's, Ed. D . 's, and M. D . 's, represented the interdisciplinary
approach which characterized the meetings. The interdisciplinary set of
speakers was matched by an equally diverse audience who represented
almost every profes- sional group concerned with the needs of disabled
children and their families. Because of the successful information
exchange that took place, a published volume of the proceedings was
determined to be useful for others who were not able to attend. To all
those who toil to help developmentally disabled children and their
families we dedicate this volume. Michael Lewis Lawrence T. Taft vii
CONTENTS Introduction xiii Part I-Sensory Development 1 / Handicapped
Child - Facts of Life 3 Me"itt B. Low 2 / Theoretical Issues in the
Early Development of Visual Perception 9 Joseph F. Fagan III and
Patricia Ann Shepherd 3 / Clinical Appraisal of Vision 35 Richard N.