Negative to Positive

flecc

Member
Oct 25, 2006
53,161
30,578
It's similar to the way an image can be burnt into a CRT TV or monitor screen and the reason for moving screen savers.

Focussing on the pinpoint of the red dot keeps the image into identical eye elements so they have their part of the image briefly fixed until recovery. Looking at a variegated surface instead of a plain one aids much quicker recovery.
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Croxden

Esteemed Pedelecer
Jan 26, 2013
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North Staffs
It's Teresa May, I claim my five pound reward.
 
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