Search results
Results from the WOW.Com Content Network
Closing of eyes – Closing the eyes may be a response to fear or embarrassment. Others may close their eyes as a way to think more sincerely about a particular subject. Eye moisture – Tears can indicate sadness, but they are also used to wash and clean the eyes. Damp eyes can be suppressed by crying or an expression of extreme happiness or ...
Eye movement can be classified according to two systems: the involvement of one or both eyes; involving one eye they may be classified as duction, and both eyes either version, if moving in the same direction, or vergence, if moving in opposite directions. [9] [10] fixational, gaze-stabilizing, or gaze-shifting.
Eye tracking device Scientists track eye movements in glaucoma patients to check vision impairment while driving. Eye tracking is the process of measuring either the point of gaze (where one is looking) or the motion of an eye relative to the head. An eye tracker is a device for measuring eye positions and eye movement.
Listing's law, named after German mathematician Johann Benedict Listing (1808–1882), describes the three-dimensional orientation of the eye and its axes of rotation. Listing's law has been shown to hold when the head is stationary and upright and gaze is directed toward far targets, i.e., when the eyes are either fixating, making saccades, or pursuing moving visual targets.
A conjugate eye movement is a movement of both eyes in the same direction to maintain binocular gaze (also referred to as “yoked” eye movement). This is in contrast to vergence eye movement, where binocular gaze is maintained by moving eyes in opposite directions, such as going “cross eyed” to view an object moving towards the face.
Oculometer is a device that tracks eye movement. [1] [2] The oculometer computes eye movement by tracking corneal reflection relative to the center of the pupil. [3]An oculometer, which can provide continuous measurements in real time, can be a research tool to understand gaze as well as cognitive function.
Ocular dominance, sometimes called eye preference or eyedness, [1] is the tendency to prefer visual input from one eye to the other. [2] It is somewhat analogous to the laterality of right- or left- handedness ; however, the side of the dominant eye and the dominant hand do not always match. [ 3 ]
Hering's window demonstration of his law of visual direction. Both eyes fixate a point on the window. The right eye sees Captain Haddock's curses book behind the fixation, the left eye sees the French press behind the fixation point. With both eyes open and fixating the book and the French press appear superimposed and straight ahead.