how many hours a day are you wearing them? what type of lenses are you wearing? contact lenses can limit oxygen exposure to the eye tissue which results in attempting to deliver more oxygen (through blood vessels) to the eye. the result is that blood vessels thicken causing the red look. soft contacts, especially those with a high water content are probably the worst for this. if you haven't been to a good eye doctor (opthamolagist -sp?- as opposed to an optomestrist) do so. most likely he/she will have you lay off the contacts for a week or so and then gradually break yourself back into wearing them for reduced duration and/or different type of contacts
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