COMPUTER HARDWARE COMPONENTS FUNCTIONS
COMPUTER OUTPUT DEVICES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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track a users eye movements and record the movements as input
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lets the user log onto a website using their eye as biometric identification
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print something out in braille
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enlarge information on a screen
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Detailed explanation-1: -How does eye tracking work? Light from infrared cameras is directed toward the participant’s pupils, causing reflections in both the pupil and the cornea. These reflections, otherwise known as pupil center corneal reflections (PCCR), can provide information about the movement and direction of the eyes.
Detailed explanation-2: -As a computer input device, an eye tracker typically emulates a computer mouse. Much like point-select operations with a mouse, the eye can “look-select", and thereby activate soft controls, such as buttons, icons, links, or text.
Detailed explanation-3: -Smooth pursuit movements are much slower tracking movements of the eyes designed to keep a moving stimulus on the fovea. Such movements are under voluntary control in the sense that the observer can choose whether or not to track a moving stimulus (Figure 20.5).
Detailed explanation-4: -Eye-tracking technology helps observe and measure eye movements, pupil dilation, point of gaze, and blinking to see where subjects of a study focus their visual attention, what they engage with, and what they ignore.