Original articleOne-Year Results of Intrastromal Corneal Ring Segment Implantation (KeraRing) using Femtosecond Laser in Patients with Keratoconus
Section snippets
Methods
Fifty eyes of 32 keratoconic patients (18 males [26 eyes] and 14 females [24 eyes]) who underwent ICRS implantation of KeraRings using a femtosecond laser for tunnel creation were included in this study. All procedures performed by the same surgeon (E.C.) at Dunya Eye Hospital, Istanbul, Turkey. The mean patient age was 28.32 ± 7.28 years (range, 18 to 44 years). All patients completed at least one year of follow-up. The Table summarizes patient demographic and refractive data.
All patients
Results
Mean follow-up was 15.6 ± 3.2 months (range, 12 to 24 months). At the last follow-up examination, SE error was statistically significantly reduced (preimplantation mean ± SD, −5.62 ± 4.15 diopters [D; range, −23.62 to 0.50 D]; postimplantation mean ± SD, −2.49 ± 2.68 D [range, −11.12 to 3.5 D; P < .001; Table).
UCVA and BSCVA were measured using Snellen scale charts. UCVA was improved in 39 eyes (78%) compared with the preoperative levels. Preoperative UCVA was 20/40 or worse in 47 eyes (94%;
Discussion
Intracorneal ring segments were first implanted in human eyes by Nosé and associates, and a few years later, Colin and associates reported their preliminary results regarding the management of keratoconus with Intacs.4, 17 The procedure is effective in most keratoconic patients, but the predictability is low and the results are variable.17, 18, 19, 20, 21, 22
Intacs inserts have a crescent-shaped arc length of 150 degrees. Their inner diameter is 6.8 mm and the outer diameter is 8.1 mm when
Dr Efekan Coskunseven was born in 1968 in Nazilli, Turkey. He graduated from Medical School of Ege University and specialized in Ophthalmology in the Medical School of Dicle University. Dr Coskunseven is the Director of Refractive Surgery Department in Dunya Eye Hospital, Istanbul, Turkey since 2003.
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Dr Efekan Coskunseven was born in 1968 in Nazilli, Turkey. He graduated from Medical School of Ege University and specialized in Ophthalmology in the Medical School of Dicle University. Dr Coskunseven is the Director of Refractive Surgery Department in Dunya Eye Hospital, Istanbul, Turkey since 2003.