May

14

More On Visual Perception - Awareness

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May

12

An Optical Illusion

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optical illusions

An optical illusion. The two circles seem to move when the viewer’s head is moving forwards and backwards while looking at the black dot.

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Apr

26

It’s Not Really What You Think You See

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Creative Commons License photo credit: Mike Raybourne

According To Matthew Luckiesh: This book, published in 1922, is a report on the applied science of optical illusions or visual illusions as they were called then. It was written by Matthew Luckiesh, Director of Applied Science, NELA Research Laboratories, National Lamp Works of General Electric Co.

I find this topic fascinating. Imagine, we thought what we saw is what it was. But, apparently, not so! This is the beginning of a series on optical, or visual illusions. (Previous articles have been written about this topic on my blog)

Optical Illusions Are Everywhere

Seeing is deceiving. Thus a familiar epigram may be challenged in order to indicate the trend of this book which aims to treat certain phases of optical illusions. In general, we do not see things as they are or as they are related to each other; that is, the intellect does not correctly interpret the deliverances of the visual sense, although sometimes the optical mechanism of the eyes is directly responsible for the optical illusion. In other words, none of our conceptions and perceptions are quite adequate, but fortunately most of them are satisfactory for practical purposes. Only a part of what is perceived comes through the senses from the object; the remainder always comes from within. In fact, it is the visual sense or the intellect which is responsible for optical illusions of the various types to be discussed in the following chapters. Our past experiences, associations, desires, demands, imaginings, and other more or less obscure influences create optical illusions.

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