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Rat eyes with chronically implanted cannulas. (A) Time series of images of two rat eyes implanted with a cannula for over 3 months (I4: left) and 10 months (I10: right). (B) Magnified images of the cannula tip in these (I4: right middle, I10: right bottom) and four other animals at experiment end. Asterisk indicates an eye that exhibited a local corneal response to the implant.
