, that is the thin tissue normally avascular and transparent that lines the part of the eye anterior to the iris.The cornea is made up of five superimposed layers, the outermost of which is the stratified paving epithelium, while the subsequent ones are formed by a dense interweaving of collagen fibrils arranged in lamellae, with a glycoprotein matrix that unites them and makes them transparent. the first layer of the cornea (epithelium) has the ability to regenerate the original tissue; the underlying layers, on the other hand, do not have this possibility and, in the case of corneal lesions, the injured tissues are therefore replaced by a scar. To allow the correct passage of light towards the internal structures of the eye, the cornea must be regular and totally transparent. If these peculiarities of the corneal surface are compromised, the result is a reduction in vision and, in some cases, blindness, even to request a transplant in the worst case. In the case of leucoma, a lot depends on where it is positioned: if it is at the side of the pupil, it will not cause excessive disturbance of vision; the closer it is to the pupillary hole, the greater the degree of disability. For further information: Anatomical Characteristics and Pathologies of the Cornea
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This alteration appears as a scarring result of some trauma (corneal abrasions, penetration of foreign bodies into the eye, etc.), inflammation (keratitis) or other injuries. By compromising the transparency of the cornea, leucoma can cause vision problems. When necessary, due to the location and extension of the opacity, treatment involves excision of the scar or transplantation of the cornea.
is the transparent avascular membrane that covers the anterior part of the eye, through which it is possible to glimpse the iris and the pupil, structurally in continuity with the sclera (the white part of the eye). This thin membrane has three important functions in vision: protection, filtration of some ultraviolet wavelengths and refraction. In practice, the cornea is the first "lens" that light encounters in the course of its natural journey towards the inside of the eye.
