He advocated a methodology that required validation against real visual phenomena.

Gazing through the clear glass, he could watch with comfort whatever visual phenomena the journey might offer.

But visual culture per se is not a visual phenomenon.

To avoid this confusion, the term subjective visual phenomena is sometimes used.

Not too large, if the visual and aurak phenomena could be detected from the river.

Hume was right when he said sympathy, compassion, is a visual phenomenon.

The visual phenomena may last from brief moments to several hours, but they also can be permanent.

The mechanisms underlying positive visual phenomena are not yet well understood.

Ice fog often leads to the visual phenomenon of light pillars.

And a visual phenomenon had grown in the air around the sword.