Optical ERGO auxiliary lens has variable working distance that allows eyepoint
to be adjusted to match operator's eyelevel, Both plain and diascopic stands have sleek, curvilinear design to allow operators to work with arms comfortably resting on base.
1995), Situational awareness as a function of frame of reference, virtual eyepoint
elevation, and geometric field of view.
Although it has received less attention, eyepoint elevation angle (EPEA) with respect to a reference point in the display is also an important variable in investigating human performance in spatial judgments.
The purpose of the present study is threefold: (a) to determine the effect of eyepoint elevation on the magnitude of error in spatial judgments of azimuth and elevation; (b) to determine the effect of binocular disparity as an enhancement to a perspective display on judgments of azimuth and elevation; and (c) in the context of spatial judgments, to investigate whether an interaction occurs between display conditions (stereoscopic vs.
The four factors that were manipulated were (a) display condition (perspective or stereoscopic display); (b) elevation of the computer graphics eyepoint with respect to an imaginary horizontal plane passing through the reference cube (at -15 [degrees], 15 [degrees], 45 [degrees], and 75 [degrees]); (c) target cube locations within each of four quadrants; and (d) altitude separation between the reference and target cube (i.
Ergonomic-driven features include upright microscopes with tilting eyepieces; eyepieces with higher eyepoints
for users with glasses; lower stage heights and focus controls to avoid repeated raising and stretching of the arm above the bench; push-button controls; and interchangeable or front-mounted controls for right- or left-handed users.