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In an eye transplant, why only the cornea is transplanted, not the whole eye ball?

Jul 20, 2015 12:00 IST

    Q. In an eye transplant, why only the cornea is transplanted, not the whole eye ball?

    Ans. The eye is connected to the brain by the optic nerve, which sends visual signals from the eye to the brain. Brain then interprets these signals as images. The optic nerve is made up of more than one million tiny nerve fibres. Once these nerve fibres are cut, they cannot be reconnected. That is why transplantation of the whole eye is impossible. But a damaged or unhealthy cornea tissue can be removed and replaced by a clear donor cornea tissue in a  corneal transplantation surgery.

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