Visual Sensitivities and Discriminations and Their Roles in Aviation
Abstract
Of 6 normally-sighted subjects, 3 had areas of the visual field that were 'blind' to oscillating disparity (motion in depth) within the central 10 deg of vision. These stereomotion-blind areas had normal sensitivity for relative position in depth (i.e. normal stereoacuity) and normal sensitivity for fron-selective sensory blindness, vergence eye movements could not be driven from within the stereomotion-blind areas, but conjugate eye movements could be driven. Vernier acuity for camouflaged bars defined by relative motion is approximately the same as vernier acuity for comparable bars defined by brightness contrast, even though receptive fields for detecting objects by motion alone are very large and sluggish. This may help to explain why helicopter pilots can make precise spatial judgements in slow low-level flight. A book has been completed that attempts to link evoked electric and magnetic fields of the human brain with human perception and cognition and with the properties of single neurons in primate brain. Keywords: Vision; Visual flying skills; Visual assessment; Motion perception; Stereo; Contrast sensitivity.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 14, 1987
- Accession Number
- ADA198470
Entities
People
- David Regan
Organizations
- Dalhousie University