Ergonomics

The 2490 has advanced mechanics: height adjustment, tilt, rotate, pivot.
A small point for criticism is here. The panel does not go all the way down to desk level leaving some 3" space. The fully equipped NEC 2490 needs that space for the soundbar though.
What makes credit to the height adjustment mechanism: it's sturdy enough to lift and hold the heaviest 24" monitor with added hood, soundbar and cables.

As mentioned before, optional hood and soundbar futher expand 2490's functionality.

Advanced technologies are implemented to reduce eye strain.

Wide range of brightness regulation from high to very low.
Auto Brightness feature automatically adjusts backlight according to ambient light.
Dinamic Brightness (Mode 2 of auto Brightness) automatically adjusts brightness according to actual brightness of the picture currently displayed. So the monitor will not blind you when a dark movie scene (or dark WEB page) is followed by a bright one.
A-TW polarizer stabilizes viewing angles. You can demonstrate your art work to a client or a group of friends, or watch video from any point in your room in the same way as you would normally do with a CRT monitor or plasma TV.

To save your vision, keep upper rim of a screen at eye level or lower. This is especially important for larger monitors (26"+).
Place your monitors this way to meet ergonomic requirements: