11) Brightness Constancy

Brightness constancy is the condition of maintaining perceptual constancy in viewing familiar objects. Thus, anything familiar to the eye will appear to have the same brightness regardless of illumination. It is also called lightness constancy.

Example:

If it is dusk or dawn, a white bed sheet will be perceived as having the same brightness. The white bed sheet will look the like the same type of white.

10) Size Constancy

Size constancy is the tendency to perceive an object as being the same size regardless of whether it is close or far away. For example when we see a skyline in the distance, we know the buildings are very tall even though they look really small. We still perceive the buildings in the background as tall because we know that they are far away and deep in our visual field based on the awareness of our environment and prior knowledge.