Asymmetric keratoconus correction may improve visual acuity, refractive outcomes

A progressive thickness intrastromal corneal ring segment may help improve visual acuity and refractive outcomes in patients with asymmetric keratoconus, according to a retrospective, observational, single-center clinical study.
One hundred four eyes of 82 patients were included in the study; 75 eyes were implanted with one Keraring AS (Mediphacos), and 29 eyes were implanted with two. The Keraring AS is not available in the United States.
The implantation procedure involved marking the horizontal axis with the patient sitting upright to control possible cyclotorsion and femtosecond laser

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