HEP Study: Head and Eye Pursuit Tracking under Natural Conditions

摘要

The broad purpose of these experiments was to determine how the eye and head are normally coordinated, and to determine the optimal combination of eye and head movements for vision and reaching. The key findings were as follows: (A) head reticle disrupts eye position during head tracking, and is of little benefit for head tracking; (B) the head is moved to view targets only when such movements are unlikely to result in the individual missing subsequent targets; (C) head-movement improves hand/eye coordination, probably by increasing the likelihood that the subject sees the target with both eyes; (D) a common eye movement monitor (scleral search coils) has a minor artifact that investigators should be aware of; (E) the eyeball is deformed when it is rotated through large angles; (F) eye movements can be less accurate in the presence of flight simulator backgrounds; (G) eye movement reaction times are slower for targets that can only be seen because of their colors; (H) when a target moves across a person's line of sight, the image of the target is smeared, but this smear is reduced somewhat when the target is surrounded by other objects; and (I) a person cannot voluntarily suppress eye movements directed opposite to a head movement, nor can they learn to suppress these eye movements.