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Comparison of the visual and refractive outcomes of one segment femtolaser-assisted intrastromal corneal ring implantation in post-LASIK ectasia and keratoconic subjects

Poster Details

First Author: S.Hashemian IRAN

Co Author(s):                  

Abstract Details


To comparison the efficacy and safety of one segment femtolaser assisted intrastromal corneal ring segment (ICRS) Intacs SK implantation in the treatment of keratoconus (KCN) and post Lasik ectasia (PLE).


Eye research center Rassoul Akram hospital, Iran University of medical sciences, Tehran- IRAN.


In this retrospective comparative study, 1 segment of Intacs SK ICRS was implanted using femtosecond laser in eyes with stage I- III KCN and PLE. Visual, refractive, corneal tomography changes and complications were analyzed over a 6-month follow-up. Postoperative visits were at 1 week, 2 and 6 months.


The study evaluated 49 eyes, 36 eyes of 26 KCN patients and 19 eyes of 15 patients with PLE that received 1 segment Intacs SK. At 6 months, the spherical equivalent decreased by a mean of 1.15 and 1.64 D, the mean sphere decreased .63 and 1.50 D and the mean cylinder decreased 1.03 and .28 D in KCN group and PLE group respectively. The mean Pre op LogMAR uncorrected distance visual acuity (UCVA) was increased by .372 and .233 and the mean Pre op LogMAR corrected distance visual acuity (CDVA) was increased by .286 and .280 in KCN group and PLE group respectively. Keratometry (K) flat and K steep decreased by a mean of 1.08 and 2.14 D and 2.15 and 3.06 D respectively (p=0.00). The mean corneal power in 3mm zone, the mean anterior and posterior BFS and irregularity in 3mm and the mean anterior chamber depth decreased significantly in both groups. 94% and 100% of eyes gained 1-6 line of DCVA in KCN group and PLE group respectively.


Femtolaser assisted implantation of one segment Intacs SK ICRS for the treatment of keratoconus and PLE patients was safe and effective, leading to significant improvement in UDVA, CDVA, and refractive error. FINANCIAL INTEREST: NONE

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