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Loose rivets · 3rd February 2006, 05:27

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.

3rd February 2006, 05:27	#45 (permalink)
Loose rivets Psychophysiological entity Join Date: Jun 2001 Location: A nimbler albino whim Age: 70 Posts: 1,897	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.