Blue hue/line: A bluish hue on the white of the eye can be seen when certain areas of the sclera are thin exposing the underlying uveal pigment. If non-progressive and painless then it is usually benign (harmless). If you are describing this on the cornea (clear dome of the eye) then it can be deposits or reflections from deposits on the cornea due to medications or systemic conditions.
Answered 9/15/2013
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