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Saccadic masking, also known as (visual) saccadic suppression, is the phenomenon in visual perception where the brain selectively blocks visual processing during eye movements in such a way that neither the motion of the eye (and subsequent motion blur of the image) nor the gap in visual perception is noticeable to the viewer.
Trace of saccades of the human eye on a face while scanning Saccades during observation of a picture on a computer screen. In vision science, a saccade (/ s ə ˈ k ɑː d / sə-KAHD; French:; French for 'jerk') is a quick, simultaneous movement of both eyes between two or more phases of focal points in the same direction. [1]
Never turn your back and try to run away from an enemy fighter. If you are surprised by an attack on your tail, turn and face the enemy with your guns. Keep your eye on the enemy and do not allow him to deceive you with tricks. If your opponent seems damaged, follow him down until he crashes to be sure he is not faking.
Upon the command "P'sent" (present) the musket was brought up to the firing position in anticipation of the command fire. Under battle conditions, many of these commands were combined for speed and efficiency. On the command prime and load troops would, without further order, carry out all movements up to and including make ready. Because of ...
Optical defocus can result from incorrect corrective lenses or insufficient accommodation, as, e.g., in presbyopia from the aging eye. As said above, light rays from a point source are then not focused to a single point on the retina but are distributed in a little disk of light, called the blur disk.
Prosopometamorphopsia (PMO), [1] also known as demon face syndrome, [2] is a neurological disorder characterized by altered perceptions of faces. In the perception of a person with the disorder, facial features are distorted in a variety of ways including drooping, swelling, discoloration, and shifts of position.
Light from a single point of a distant object and light from a single point of a near object being brought to a focus. The accommodation reflex (or accommodation-convergence reflex) is a reflex action of the eye, in response to focusing on a near object, then looking at a distant object (and vice versa), comprising coordinated changes in vergence, lens shape (accommodation) and pupil size.
Fogging, also known as blurring, is used for censorship or privacy. A visual area of a picture or movie is blurred to obscure it from sight. A visual area of a picture or movie is blurred to obscure it from sight.