New glucose test

    The idea is to create a glucose sensor for diabetes sufferers which will use tear fluid instead of blood. This may soon eliminate the need for finger pricks.
    The device will be able to take a sample of tear fluid by a painless dab at the corner of the eye. The device's sensor will measure the amount of glucose in the tear sample which is supposed to be very similar to the amount of glucose in blood.

    Image: A - screen-printed electrical leads, B - an insulating layer, C - a silicone fluidics piece, D - a sensing well covering the three electrode system, E - an absorbent sampling material.