• What Causes the Cornea to Thicken?


    Question:

    What causes the cornea to thicken?


    Answer:

    The most common cause of a cornea that thickens over time is edema or swelling. Think of the cornea as a five-layered sandwich. The inner layer, the corneal endothelium, acts as a barrier to the water-like fluid inside the eye (aqueous humor) from entering the cornea and causing swelling of the cornea. We are all born with a given population of these protective cells. Their population decreases with aging, some eye diseases, and as a result of trauma.


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