A visual device, like a huge - a huge eye.

This was accomplished by using a system of visual, optical, electronic, and other sensory devices.

One visual device the architects used was to put a curve in the western wall to "shorten" it.

Some writers rely on visual devices but try to do it understatedly.

The film also makes use of visual and aural devices.

They rely both upon colour and a variety of simple visual devices.

The composition follows the visual device of division into compartments.

Where possible, they are used as visual devices to give the illusion of more space.

We'd been sent to plan the insertion of a visual and audio device into an arms dealer's house in Vancouver.

It's just a visual device that makes it easier to frame one's shots, figure out where to put the camera.