5
Using PCEye Explore
5.1
Positioning the User
Figure 5.1 Positioning
The mounted PCEye Explore attached to its Magnetic Mounting Plate and to your device is designed to work optimally when it
is parallel to the user
’
s eyes at a distance from about 45
—
90 cm (18 to 35 inches) for PCEye Explore, see
Figure 5.1 Position-
ing, page 9
or
Figure 5.2 Positioning when Users Leaning Sideways or Those Lying Down, page 9
.
Figure 5.2 Positioning when Users Leaning Sideways or Those Lying Down
This means that for those users leaning sideways or those lying down the PCEye Explore with monitor and computer device also
needs to be tilted in order to keep the users eyes parallel to the screen and at the optimal distance, see
Figure 5.2 Positioning
when Users Leaning Sideways or Those Lying Down, page 9
.
Make sure the user is placed comfortably in relation to the optimal positioning of, and distance from, the unit. Be
aware also that the user
’
s comfort, as well as the Gaze Interaction performance, will be enhanced if the sun is not
shining directly on the screen or into the user
’
s eyes.
The optimal distance that a user should be from the PCEye Explore mounted on a monitor/laptop differs depending on the size
of the screen. The user should be positioned at the optimal distance to allow for the best possible Gaze Interaction.
Generally, the larger the size of the screen, the greater the distance the user should be from the Eye Tracker / Screen combina-
tion for optimal Gaze Point usage.
Smaller than a 10 inch screen and larger than a 27 inch screen should not be used for optimal Gaze Point usage, for more infor-
mation see
Appendix D Technical Specifications, page 23
.
5.1.1
Track Box
The PCEye Explore allows for extensive Freedom of Head Movement. Once the PCEye Explore is properly calibrated and
placed in front of the user, no further adjustments are required.
At 70 cm (27.5 in) the PCEye Explore allows for lateral Freedom of Head Movement in an area of about 48 × 39 cm (19 × 15
in).
In order to function properly for Gaze Point usage the user needs at least one eye in the track box at all times.
Tobii Dynavox PCEye Explore User
’
s manual v.1.0 - en-US
5 Using PCEye Explore
9
