KC is a progressive and degenerative disease of the cornea
Vision is affected in several ways simultaneously, including ghosting, blurring, double vision, and a haloing effect
Both genetic factors and mechanical strain have been hypothesized to lead to the disease
Course of treatment varies from mild KC (glasses) to moderate KC (special contact … Specialty contact lenses have been developed to better fit the irregular and steep corneas found in keratoconus; these include (but not limited to) RoseK, custom-designed contact lenses (based on topography and/or wavefront measurements), semi-scleral contact lenses, piggyback lens use ( hard lens over soft lens), scleral lenses, hybrid lenses, and PROSE (prosthetic replacement of the ocular surface ecosystem). Sometimes, however, the structure of the cornea is just not strong enough to hold this round shape and the cornea bulges outward like a cone. Keratoconus usually affects both eyes, though it often affects one eye more than the other. Graft rejection can occur after penetrating keratoplasty, requiring prompt diagnosis and treatment to ensure graft survival. Examples include conditions such as keratoconus, keratoglobus, pellucid marginal degeneration, and corneal ectasia after surgery. 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