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Asymmetrical base intracorneal ring segment can be used for keratoconus treatment
Keratoconus is a noninflammatory, progressive, bilateral ectatic corneal disease with corneal stromal thinning that results in weakening and surface distortion of the cornea. The onset of this disease process is often between the ages of 10 and 25 years. Blurred vision is usually secondary to irregular astigmatism, myopia and corneal scarring. The ectatic cornea often takes the shape of a cone. Risk factors for keratoconus include a family history of keratoconus, excessive eye rubbing, atopic disorder, obstructive sleep apnea, connective tissue afflictions such as Marfan syndrome,