The cornea is a transparent ocular structure. The transmission and refraction of light through the cornea depend primarily on a highly specialized ultrastructure.
The corneal stroma is carefully structured to minimize light scatter with important contributions from the extracellular matrix with its proteoglycans, carefully spaced collagen fibrils and crystallin-expressing keratocytes. Along with ultrastructure, the corneal transparency is maintained by active endothelial pumps. Tear film, epithelium and ocular surface also contribute to the transparent nature of the cornea. Abnormalities in
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