Accession Number:

AD0749319

Title:

Apparent Object Movement Produced by Head Movement under Water

Descriptive Note:

Medical research progress rept. no. 8

Corporate Author:

NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT

Personal Author(s):

Report Date:

1972-01-14

Pagination or Media Count:

12.0

Abstract:

It was predicted that due to the optical distortion produced by wearing a facemask, the constancy of visual position would not be maintained under water, i.e., stationary objects should appear to move when the head is moved. Subjects made magnitude estimates of object movement in both air and water. Twice as much movement occurred in water as in air. Two underwater activities, head rotation while observing vertical stripes, and practice in hand-eye coordination, produced a small reduction in object movement. The results indicate that apparent object movement loss of position constancy should be added to the list of visual problems which confront the diver.

Subject Categories:

  • Anatomy and Physiology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE