The cornea is the most anterior structure of the eye and to be transparent has two main functions: to protect other intraocular structures and pass the images to their final destination, the retina.
Thus, to better understand the function of the cornea, the same mica compare it to a clock: it must be strong to protect the other structures of the watch and simultaneously transparent to let us see the time. If for some reason, the cornea loses its transparency, becoming opaque, the patient may not have a clear vision, even could lead to blindness.
There are many reasons that cause loss of transparency of the cornea, among which are:
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