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Credit: FreeDigitalPhotos.net / Renjith Krishnan |
Human vision is incredible. The human eye and brain are adept at recognizing objects, often even when they are not fully visible or oriented at different angles than usual. For example, by seeing just a silhouette of a cat, even small children can identify what the animal is. Making out the faintest trace of a streetlamp in fog, our eyes instantly relay to our brains the identity of the object. Seeing a bird in the sky with wings on the downstroke or upstroke does not confuse us; we can clearly recognize the shape as a bird. On average, the time it takes for this process of perception and recognition is within 70 milliseconds, or about half the time of an eye blink. Although we often think of our eyes as what we see with, we really “see” with our brains. Except for the lens and cornea, the rest of the eye is really part of the brain.To read the rest, click on "Human Vision: Amazing Uniqueness of Human Eyesight".
For the lyrics to this 1984 song by Prodigal, click on "Electric Eye".
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