Scientists have 3D printed corneas for the first time in new research, offering hope to millions of people around the world whose eyesight is affected by damage to the delicate tissue. The cornea is a clear sheath that sits over the iris and the pupil, helping to direct light rays onto the retina. If the cornea becomes damaged, the image sent to the brain can become blurry. Currently, patients with damaged corneas can undergo transplants in serious cases, but this necessitates a donor—of which there is a significant shortage.
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