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Increased fragility in GK rats cornea. A 4-mm-round PVC membrane was attached to the center of rat corneas for 30 seconds and taken off. Fluorescein staining was performed immediately to highlight the denuded area. A: Representative images are shown. B: The fragility of the cornea was qualified by measuring the green value (fluorescein staining level) (n = 10). **P < 0.001.
