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vision

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Vision


Ability or act of seeing. Light that enters the eye is focused by the eye lens, creating a sharp image on the retina. Electrical signals from the retina travel down the optic nerve where they are interpreted by the brain.

In humans, the image of an object created by each of our eyes is slightly different because our eyes are in different positions. The brain combines the two images to give a sense of depth. This is known as binocular vision. With one eye closed we lose some of our sense of depth and perspective.

© Research Machines plc 2008. All rights reserved. Helicon Publishing is a division of Research Machines plc.


 
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colour (physics)
concave lens
concave mirror
convex lens
convex mirror
diffraction
dispersion (physics)
eclipse
eye
filter (optics)
hypermetropia
image (physics)
lateral inversion
light
long-sightedness
myopia
penumbra
prism (optics)
real image
reflection (physics)
refraction
shadow
short-sightedness
spectrum
speed of light
umbra
virtual image
vision
white light

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