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Congenital and degenerative changes of the cornea
Congenital and degenerative changes of the cornea
For congenital anomalies include anomalies of the size and shape of the cornea.
Mikrokornea.
Mikrokornea or small cornea - corneal anomaly of development characterized by a decrease in its size. Typically, such an anomaly is combined with hypoplasia of the eye. If the function can restore vision, carry out surgery. With full mal-treatment of the eye is impossible.
Makrokornea.
Makrokornea or megalokornea this congenital anomaly in which the dimensions of the cornea increased. Giganstkaya cornea can reach a size of 1.5 cm The dimensions of the eye in this case, there are also increased. Sometimes the cornea is a big sign of congenital glaucoma. Treatment of surgery.
Keratoconus, keratoglobus.
Inherent change in the shape of the cornea, in which the cornea is shaped like a cone or a convex hemisphere. Usually these changes are associated with disruption of the structure of protein components of corneal tissue and appear to 14-18 years. Appointed by the wearing of hard contact lenses, with no effect, corneal transplantation is carried out.
Dystrophic keratitis are primary, which arise as a result of metabolic disorders. These dystrophies are often hereditary. They are usually bilateral. Primary keratitis affect both the individual layers and the entire cornea. During the primary dystrophic keratitis medlennoprogressiruyuschee. In the end, there is some degree of visual function disorders. Drug treatment is usually the result does not. Surgical treatment - a fiber or penetrating corneal transplantation.
Secondary keratitis developed as an outcome of keratitis occurred for various reasons: due to infection, trauma.
Gerontoxon.
Gerontoxon - a circular corneal opacity in the periphery. It develops in old age and is caused by metabolic disorders, mostly of fat metabolism and cholesterol metabolism. On the state of gerontoxon usually not reflected, so the treatment is not indicated, but recommend monitoring by an ophthalmologist.
Band-shaped corneal opacity.
Band-shaped corneal opacities - a consequence of violations of the structure of the connective tissue and deposition of calcium salts in the cornea at its center, usually in a horizontal direction. Usually this condition occurs in the eyes of the blind, after suffering inflammatory disease of the eyeball (panoftalmit) the loss of the eye.
Kaiser-ring Fleyshnera.
Kaiser-ring Fleyshnera a deposition of pigment dye brown-green color on the periphery of the cornea in a ring. It occurs in violation of exchange of copper, which occurs in hepatolenticular degeneration, accompanied by disorders of the liver and nervous system. The ring itself does not affect visual acuity and does not require treatment.
Bullous keratitis.
This disease occurs in old age in the eyes of the blind with glaucoma. It is accompanied by the formation of bubbles in the cornea that can be easily opened, heal and emerge again. Necessary to treat the underlying disease.
