PPRuNe Forums - View Single Post - VISION THREAD (other than colour vision)
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Old 3rd February 2006 | 03:27
  #45 (permalink)  
Loose rivets
Psychophysiological entity
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Joined: Jun 2001
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From: Walton on the Naze Essex.
I was giving an example of one particular angle, say 080, and the image that you might see with slight to moderate astigmatism.

I picked the colour red because there is a higher probability that this light will be problematic, or for the purpose of testing, demonstrate a defect more dramatically with an everyday object. An LED number is made up of 7 segments, three of which are horizontal and four vertical...or near enough.

A single point of light may show an almost complete secondary image, offset to a constant angle. The colour of the light may well affect the degree to which you see this error but the angle will stay the same.
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