May 2003
Volume 44, Issue 13
Free
ARVO Annual Meeting Abstract  |   May 2003
Combined ICRS and LASIK (IC-LASIK) for Moderate to High Myopia
E.F. Jarade; S.I. Mian; A. Scally; D.T. Azar
Author Affiliations & Notes
  • E.F. Jarade
    Cornea and Refractive Surgery Department, Massachusetts Eye and Ear Infirmary and Schepens Eye Research Institute, Harvard Medical School, Boston, MA, United States
  • S.I. Mian
    Cornea and External Disease, Cataract and Refractive Surgery Service, Kellogg Eye Center, University of Michigan, Ann Arbor, MI, United States
  • A. Scally
    Cornea and External Disease, Cataract and Refractive Surgery Service, Kellogg Eye Center, University of Michigan, Ann Arbor, MI, United States
  • D.T. Azar
    Cornea and External Disease, Cataract and Refractive Surgery Service, Kellogg Eye Center, University of Michigan, Ann Arbor, MI, United States
  • Footnotes
    Commercial Relationships  E.F. Jarade, None; S.I. Mian, None; A. Scally, None; D.T. Azar, None.
  • Footnotes
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Investigative Ophthalmology & Visual Science May 2003, Vol.44, 967. doi:
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      E.F. Jarade, S.I. Mian, A. Scally, D.T. Azar; Combined ICRS and LASIK (IC-LASIK) for Moderate to High Myopia . Invest. Ophthalmol. Vis. Sci. 2003;44(13):967.

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Abstract

Abstract: : Purpose: To describe the early results of combining Intrastromal corneal ring segment (ICRS) and Laser in situ keratomileusis (LASIK) surgery (IC-LASIK) for the treatment of moderate to high myopic patients with relatively thin corneal pachymetry. Methods: IC-LASIK is performed as a 2-stage procedure: ICRS channelling followed by LASIK and ICRS insertion 4-14 days later. 15 eyes of 11 patients with mean preoperative spherical equivalent of –9.54 ± 2.00 D (-7.13 to –13.5 D) and mean preoperative astigmatism of 1.11 ± 0.78 D (0.00 to –3.00 D) were treated with IC-LASIK. The laser nomogram was adjusted to reflect undercorrection of 3-4 D to be corrected with the ICRS. The mean central pachymetry was 524.14 ± 36.17 µm (472 to 579 µm). The ICRS size used was 0.25 mm in 10 eyes, 0.3 mm in 4 eyes and 0.35 mm in 1 eye. Results: Uncorrected visual acuity was 20/40 or better in 7/15 (46.67%) eyes at 1 month, 4/7 (57.14%) at 3 months, 2/5 (40%) at 6 months and 1/1 (100%) at 12 months. Best spectacle-corrected visual acuity (BSCVA) was 20/40 or better at all time intervals. There was no change in BSCVA in 7/15 (46.67%) eyes, two eyes gained 1 line of BSCVA, 4 eyes lost 1 line of BSCVA and 2 eyes lost 2 lines of BSCVA. No eyes lost greater than 2 lines of BSCVA. The postoperative spherical equivalent was within ± 1 D of the intended refraction in 11/15 (73.33%) eyes at 1 month, 5/7 (71.43%) eyes at 3 months, 3/5 (60%) at 6 months and 1/1 (100%) eye at 12 months and the postoperative cylinder was within ± 1 D at all time intervals. No serious complications were encountered. Conclusions: IC-LASIK is a relatively safe and effective procedure in reducing the amount of laser ablation necessary for full treatment by 1 to 3 D. It shows promising results as a tissue-saving procedure in moderate and high myopes with relatively thin corneas and may help decrease the risk of LASIK induced keractasia in these patients.

Keywords: refractive surgery: other technologies • clinical (human) or epidemiologic studies: sys • clinical (human) or epidemiologic studies: tre 
© 2003, The Association for Research in Vision and Ophthalmology, Inc., all rights reserved. Permission to republish any abstract or part of an abstract in any form must be obtained in writing from the ARVO Office prior to publication.
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