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Effectiveness of intracorneal ring segments for keratoconus

Park, Se Euna; Tseng, Michaelb; Lee, Jimmy K.b

Current Opinion in Ophthalmology: July 2019 - Volume 30 - Issue 4 - p 220–228
doi: 10.1097/ICU.0000000000000582
REFRACTIVE SURGERY: Edited by Jimmy K. Lee

Purpose of review To review the efficacy of intrastromal corneal ring segments (ICRS) for keratoconus and with other interventions such as contacts lens, keratoplasty, and corneal collagen cross-linking.

Recent findings Changes in ICRS thickness and size, combination of procedures, and the adaptation of a more sophisticated classification system have broadened our application of ICRS. Recent studies have shown the long-term efficacy of ICRS in visual acuity, keratometry, and astigmatism.

Summary Studies have demonstrated the short-term and long-term efficacy of ICRS implantation in patients with keratoconus.

aAlbert Einstein College of Medicine

bDepartment of Ophthalmology and Visual Sciences, Montefiore Medical Center, Bronx, NY, USA

Correspondence to Jimmy K. Lee, MD, Associate Professor of Ophthalmology and Visual Sciences, Albert Einstein College of Medicine, Director of Cornea and Refractive Surgery, Department of Ophthalmology and Visual Sciences, Montefiore Medical Center, 3332 Rochambeau Avenue, 3rd floor, Bronx, NY 10467, USA. Tel: +1 718 920 5263; fax: +1 718 881 5439; e-mail:

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