These are photographs taken in our office by our slit lamp camera. The clear cornea is a very unique tissue of the body. It is one of the only living tissues of the body that in it's normal state does not have any blood vessels going through it. Because it does not have a blood supply going through it, the cornea needs to acquire nutrients from the inside fluid of the eye and the tears. It gets oxygen from the environment as opposed from your body and that is why proper contact lens wear and care is absolutely necessary for maintaining corneal health because the oxygen needs to be able to transmit through the contact lens. If it doesn't achieve it's oxygen requirements, the cornea will be at risk for swelling, infection, inflammation, clouding and even possible blindness. I will try and find some pictures of unhealthy corneas and post them in the near future.
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Side profile of dome-shaped cornea (above).
Eye without contact lens (above).
Eye with contact lens (below). Most soft contact lenses are 13.8 - 14.5 mm in diameter and should lay onto the white part of the eye called the bulbar conjuctiva.
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