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As the disease progresses, special contact lenses (such as scleral contact lenses) may be required. [3] In most people, the disease stabilizes after a few years without severe vision problems. [3] In 2016, the FDA approved corneal collagen cross-linking to halt the progression of keratoconus. [10]
Pellucid marginal degeneration, a bilateral, noninflammatory disorder, characterized by a peripheral band of thinning of the inferior cornea. [4] Posterior keratoconus, a rare condition, usually congenital, which causes a nonprogressive thinning of the inner surface of the cornea, while the curvature of the anterior surface remains normal.
(H18.6) Keratoconus — degenerative disease: the cornea thins and changes shape to be more like a cone than a parabole (H19.3) Keratoconjunctivitis sicca — dry eyes (H20.0) Iritis — inflammation of the iris (H20.0, H44.1) Uveitis — inflammatory process involving the interior of the eye; Sympathetic ophthalmia is a subset.
2-year functional survival (visual acuity better than 1.30 logMAR or 20/400 Snellen): 63% for OOKP and 49% for OKP; 10-year functional survival (visual acuity better than 1.30 logMAR or 20/400 Snellen): 38% for OOKP and 17% for OKP [6] Another long-term study of 181 patients puts the chances of retaining an intact OOKP after 18 years at 85%. [7]
Neurotrophic keratitis (NK) is a degenerative disease of the cornea caused by damage of the trigeminal nerve, [1] which results in impairment of corneal sensitivity, spontaneous corneal epithelium breakdown, poor corneal healing and development of corneal ulceration, melting and perforation. [2]
Keratoconjunctivitis is a term used to describe inflammation of both the cornea (the clear, front part of the eye) and the conjunctiva (the thin, transparent membrane covering the white part of the eye and lining the inside of the eyelids). This condition can have various causes, and its presentation may vary depending on the underlying factors.
Adenoviral keratoconjunctivitis, also known as epidemic keratoconjunctivitis, is a contagious eye infection, a type of adenovirus disease caused by adenoviruses. [1] It typically presents as a conjunctivitis with a sudden onset of a painful red eye, watery discharge and feeling that something is in the eye. [ 3 ]
Abnormal corneal topography compromises of keratoconus, pellucid marginal degeneration, or forme fruste keratoconus with an I-S value of 1.4 or more [4] is the most significant risk factor. Low age, low residual stromal bed (RSB) thickness, low preoperative corneal thickness, and high myopia are other important risk factors.