vision ****
visual sensation

David closed his eyes, and the conflicting visual sensations became clearer.

The test determines the threshold, or minimum light intensity required to produce a visual sensation in the child's eye.

Of course, the visual sensation usually associated with the metal gold is its metallic shine.

You, oddly, carry visual sensation of one line only.

Most reach for visual sensations that offer a parallel to some direct observation.

The event becomes a work of art, a visual sensation delivered by color.

The visual sensation usually associated with the metal silver is its metallic shine.

The subjects did not change, but the visual sensations - due to changing conditions of light - changed constantly.

It was the tactile, not the visual sensations that upset him.

The "attribute of a visual sensation according to which an area appears to emit more or less light".