The papers included in this volume were presented as a part of the dedication of a new clinical/teaching/research facility for the University of Houston College of Optometry, March 27-31, 1977. These papers were intended to cover the "state of the art" knowledge in all areas of visual system investigation. While we may not have quite reached our goal of covering all areas, the papers presented here cover a broad cross-section of investigations in vision. However, without doubt, the intention of "state of the art" coverage was achieved in all areas discussed. From the beginning, with the...