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Intracorneal rings are specifically designed to treat keratoconus, a condition characterized by the thinning and bulging of the cornea into a cone-like shape. This irregular shape can lead to significant visual distortion and refractive errors. The insertion of intracorneal rings aims to flatten the cornea’s central region and help restore a more normal corneal curvature, which improves vision by reducing the irregular astigmatism caused by the condition.

The other conditions listed do not benefit from the use of intracorneal rings. Myopia (nearsightedness) can be treated with corrective lenses, surgical procedures like LASIK, or other methods but is not addressed by intracorneal rings. Hyperopia (farsightedness) also relies primarily on corrective lenses or refractive surgery, while presbyopia, the age-related condition associated with difficulty focusing on near objects, is typically managed with reading glasses or multifocal lenses rather than surgical interventions like intracorneal rings.