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The Head-Neck Sensory Motor System$
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Alain Berthoz, Werner Graf, and P. P. Vidal

Print publication date: 1992

Print ISBN-13: 9780195068207

Published to Oxford Scholarship Online: March 2012

DOI: 10.1093/acprof:oso/9780195068207.001.0001

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PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 14 May 2021

Identification of Peripheral Visual Images in a Laterally Restricted Gaze Field

Identification of Peripheral Visual Images in a Laterally Restricted Gaze Field

(p.439) Chapter 68 Identification of Peripheral Visual Images in a Laterally Restricted Gaze Field
The Head-Neck Sensory Motor System

John L. Semmlow

Gabriel M. Gauthier

Jean-Louis Vercher

Oxford University Press

The study in this chapter aims to assess the effects of degraded peripheral vision on visual performance. A series of preliminary psychological experiments were conducted to evaluate identification task performance in unrestricted viewing conditions in terms of the required time to identify a peripherally located three-digit number. This study is inspired by the case of decreased performance and discomfort of patients wearing corrective lenses with distorted peripheral fields. The experiments in the study involve three subjects whose head and eye movements were simultaneously recorded using an infrared reflection technique and an ultrasonic head movement monitor, respectively. A block diagram of a model to represent the task of identifying eccentric targets during restricted peripheral vision is constructed in this chapter. It is concluded that identification of peripheral targets when peripheral vision is restricted requires a coordinated and precise motor response from head and eyes.

Keywords:   peripheral vision, corrective lens, eye movements, eyes, head, motor response

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