Not sure: This is an unusual symptom, and I am sure how this can be easily explained. Blue is the most refracted color and tends to be defocused, so anything scattering light such as corneal swelling can lead to bluish vision, but this is usually from light sources at night. This, however, is not a common complaint, so you might need to get an eye exam to verify everything with the eyes is healthy.
Answered 6/20/2013
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