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Medical Forum / General / Vision / March 2005Reading Blue Letters at Night?
Anyone experience this. Blue signs are harder to read at night than other colors. > Anyone experience this. Blue signs are harder to read at night than > other colors. Sure. The explanation for this is that the blue wavelengths are refracted more, coming to a focus in front of the retina. Therefore the eye is myopic to blue light at night. DrG This refraction effect is also why the sky is blue. Light coming from the sun is refracted by our atmosphere, because blue refracts widely, the sky takes on the color of the widest refracted light wavelength - blue. Glenn Hagele Executive Director Council for Refractive Surgery Quality Assurance Email to glenn dot hagele at usaeyes dot org http://www.USAEyes.org http://www.ComplicatedEyes.org I am not a doctor. Except when it's overcast. DrG |
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