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Stare at the red dot in the center for 30 seconds and then look at something white.

Opponent-Process Theory - The theory that opposing retinal processes (red-green, yellow-blue, white-black) enable color vision. For example, some cells are stimulated by green and inhibited by red; others are stimulated by red and inhibited by green.

Valerie Larripa-230-012. Chapter 3 taks about perceptual constancy. Perceptual constancy is the tendency to perceive an object to be the same, even though sensations produced by the object may differ under different conditions. The website explains in depth what perceptual constancy is and it also provides an example. A broad grasp of Perceptual constancy is generally achieved at the age between 4-5 months old.

Take a look at this amazing Monsters Illusion illusion. Browse and enjoy our huge collection of optical illusions and mind-bending images and videos.

The law of similarity states that elements within an assortment of objects are perceptually grouped together if they are similar to each other in shape, colour, shading or other qualities. The figure portrays 36 circles all equal distance apart from one another forming a square. 18 of the circles are shaded dark and 18 of the circles are shaded light. We perceive the dark circles as grouped together, and the light circles as grouped together forming six horizontal lines.

In the first two sections of this primer, we covered the basic elements of design, and the basic principles of design. In this section, we'll cover the basic principles of composition.

Two Faces or a Vase? Old or Young Lady? 10 Simple but Wonderful Optical Illusions

One of my favorite things that was shown to me during my elementary age years was an optical illusion. It was the very famous Rubin Vase (pictured below) which you can see in either two ways - as a vase or as two faces that are facing each other.

one and the same

Mouth of Flower - Octavio Ocampo This is good art because it is an optical illusion. It could either be just some flowers with a butterfly, or you can also see a woman's face. It is very creative in a subtle way.

Using only makeup, Russian artists turn models’ faces into optical illusions - Imgur

Silhouette by Alexander Khokhlov Artist and photographer Alexander Khokhlov took this brilliant photo entitled “Silhouette”, as a part of the project “Weird Beauty”. Model is Alexandra Romanova and make-up artist is Valeriya Kutsan.

It's easy to be confused or scared by the simplest things or you might just want to see the funny side.

If you first look at this picture, it appears as an eyeball. But it is really water in a sink being drained. This picture was perfectly timed in order to get such a cool affect.