As the crew watched, awestruck, the optical distortion seemed to increase in speed.

The angle of projection is adjustable, so no optical distortion results from ceiling placement.

But the extra glass and clear liquid introduced optical distortions that would be apparent in still photos.

About a minute ago, a bright light and figures were sighted within the optical distortion.

A second filter is also applied to compensate for the optical distortion induced by lens setup.

Rahim, watch for signs of optical distortion on the surface.

And something was happening to it, spreading away from the impact point in a ripple of optical distortion.

Phototypesetting suffered (at least in its early days) from many problems relating to optical distortion and misalignment.

Also, there is less optical distortion when the screen is viewed from the side.

The garden's most impressive effect, however, is the optical distortion it imposes on the surrounding cityscape.