Manual Controls For The Eyegaze Edge Links Computer Access Program - LCT Eyegaze Edge User Manual

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the calibration is retrieved. The calibration is saved in a separate file and can be recalled from the

calibration procedure by pressing the F4 key.

Decrease Gaze Duration

Each manual press of the F6 function key decreases the amount of time necessary for the user to

activate a key by 1/10-second, making the keys respond faster to the user's gaze. When changing the

gaze duration with either F6 or F7 keys, the adjusted value is briefly displayed in the upper right corner

of the Control screen. Changing to another Eyegaze program reverts the gaze duration back to its

original setting.

Increase Gaze Duration

Each manual press of the F7 function key increases the amount of time necessary to activate a key by

1/10-second, causing the keys to respond more slowly to the user's gaze. When the user exits the

program he is in, the gaze duration will return to its default setting. Changing to another Eyegaze

program reverts the gaze duration back to its original setting.

Toggle Locator Dot

Pressing the F9 function key switches the display of the locator dot on the control screen between three

different modes:

In-key

Never-on

Always-on

Users generally prefer to us the in-key mode so that the dot does not appear when they are looking at

inactive regions of the screen, but does appear when their eye position is about to initiate an Eyegaze

action. With the locator dot always on, you can see where the user is looking whether or not he is

looking within a key. Turning the dot off is occasionally useful for people who are distracted by the dot,

but without its visual feedback Eyegaze operation will be more difficult for the user. The F9 key acts as

a toggle switch, switching the display mode between its three different states. Upon pressing the F9

key, a brief message appears in the upper right corner of the screen to indicate the new dot display

mode.

Control + F12 Toggle Eye Image

The eye image displays appear in the upper right corner of the control screen, and are controlled by

CONTROL (CTL) plus the "Toggle Eye Image" function key (F12) on the manual keyboard. The

Eyegaze Edge can be set to display or not display eye images.

Typically the eye images are always displayed. It is useful to the user to be able to see what the

Eyegaze Edge "sees". Changing the toggle to display images should only be done when a separate

tabletop image monitor is being used, occasionally necessary for young children who may be distracted

by the eye image display.

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