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What is the cornea?

No doubt about it, your eye is full of fragile stuff. Thank goodness for your cornea, that tough, transparent, dome-shaped cover on the outside of the colored part of your eye. It defends against dust, debris, and even bacteria. The curved shape of the cornea also bends light as it enters your eye, helping to focus images on the retina.

The cornea is the clear front window of the eye. It covers the iris (colored portion of the eye) and the round pupil, much like a watch crystal covers the face of a watch. The cornea is composed of five layers. The outermost layer is called the epithelium.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.