Evaluation of intrastromal corneal ring segments for treatment of post-LASIK ectasia patients with a mechanical implantation technique

Tunc, Zeki; Helvacioglu, Firat; Sencan, Sadik
November 2011
Indian Journal of Ophthalmology;Nov2011, Vol. 59 Issue 6, p437
Academic Journal
To evaluate the clinical outcomes of Keraring segment implantation in patients with post- laserassisted in situ keratomileusis (LASIK) ectasia, using a mechanical implantation technique. Materials and Methods: Twelve eyes of 10 patients with post-LASIK ectasia were enrolled. Intracorneal ring segments (ICRS) were implanted aft er dissection of the tunnel using Tunc's specially designed dissector under suction. A complete ophthalmic examination was performed, including uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), spherical equivalent, keratometric (K) readings, inferosuperior asymmetry index (ISAI), and ultrasound pachymetry. All 3, 6, and 12-month follow-ups were completed, and statistical analysis was performed. Results: The mean preoperative UDVA for all eyes was 1.28 ± 0.59 logMAR. At 12 months, the mean UDVA was 0.36 ± 0.19 logarithm of the Minimum Angle of Resolution (logMAR) (P=0.002), and the mean preoperative CDVA was 0.58 ± 0.3 logMAR, which improved to 0.15 ± 0.12 (P=0.002) at 1 year. There was a signifi cant reduction in cylindrical refractive and spherical equivalent refractive error from -5.29 ± 2.47 diopters (D) and -5.54 ± 5.04 D preoperatively to -1.47 ± 0.71 D and -0.74 ± 1.07 D (P=0.001, P=0.002), respectively, at 1 year. In the same period, the mean K- readings improved from 47.93 ± 4.84 D to 40.87 ± 2.36 D (P=0.002), and the mean ISAI improved from 5.34 ± 3.05 to 2.37 ± 1.68 (P=0.003). No signifi cant changes in mean central corneal thickness were observed postoperatively. There were no major complications during or aft er surgery. Conclusion: ICRS implantation using a unique mechanical dissection technique is a safe and eff ective treatment for post-LASIK ectasia. All parameters showed improvement at 1-year follow-up.


Related Articles

  • Rochester nomogram helps improve custom LASIK results for myopia. Charles, Lynda // Ophthalmology Times;10/1/2006, Vol. 31 Issue 19, p50 

    The article focuses on the statement of doctor Manoj Subbaram regarding the Rochester nomogram for custom LASIK, which according to him significantly provides better postoperative results in patients who have undergone surgery for myopia. According to Dr. Subbaram, Rochester nomogram for custom...

  • Laser provides safer option. Krader, Cheryl Guttman; Ramamurthy, D. // Ophthalmology Times;11/1/2012, Vol. 37 Issue 21, p66 

    The article discusses LASIK eye surgery for iatrogenic keratectasia. It mentions that the incidence of iatrogenic keratectasia is significantly higher in eyes having flap creation using a mechanical microkeratome after LASIK as compared with a femtosecond laser according to the results of the...

  • LASIK improves near, distance visual acuity after DALK for keratoconus. Correa, Mark; Hasson, Matt // Ocular Surgery News;9/10/2012, Vol. 30 Issue 17, p28 

    The article discusses a study carried out on 12 eyes of 11 keratoconus patients who had already undergone deep anterior lamellar keratoplasty for explaining the way Laser-Assisted in Situ Keratomileusis (LASIK) helped for the successful correction of refractive error without any complication.

  • Laser in situ keratomileusis enhancements with the Ziemer FEMTO LDV femtosecond laser following previous LASIK treatments. Pietilä, Juhani; Huhtala, Anne; Mäkinen, Petri; Uusitalo, Hannu // Graefe's Archive of Clinical & Experimental Ophthalmology;Feb2013, Vol. 251 Issue 2, p597 

    Background: The aim of this paper is to present the accuracy, predictability, and safety outcomes of LASIK enhancements performed with the FEMTO LDV femtosecond laser (Ziemer Ophthalmic Systems, Port, Switzerland) and the Allegretto Wave Concerto 500 Hz excimer laser (Wavelight AG, Erlangen,...

  • CXL technique adds stability. Krader, Cheryl Guttman; Kranemann, Christoph; Stevenson, Marcelo // Ophthalmology Times;2/1/2013, Vol. 38 Issue 3, p24 

    The article discusses the report released on efficacy of partial corneal collagen crosslinking (CXL) which is performed during hyperopic Laser-Assisted In Situ Keratomileusis (LASIK) for stabilizing post-operative refraction and reduction of reduction after an eye surgery. It highlights the...

  • Imaging device could assist in determining refractive surgery's impact on vision. Shiba, Takuya // Ocular Surgery News;11/10/2012, Vol. 30 Issue 21, p19 

    The article discusses a study to evaluate the use of functional magnetic resonance imaging (fMRI) to help evaluate the impact of refractive surgery like Laser-Assisted in Situ Keratomileusis (LASIK) on vision beyond the posterior eye segment. The findings indicate that it may take several months...

  • A Closer Look at the Options for LASIK Surgery. Kezirian, Guy M. // Review of Ophthalmology;Dec2003, Vol. 10 Issue 12, p30 

    Discusses three Lasik platforms. Allegretto Wavelight; Uncorrected visual acuity; Regulatory considerations.

  • A clinical follow up of PRK and LASIK in eyes with preoperative abnormal corneal topographies. Schor, P.; Beer, S.M.C.; da Silva, O; Takahashi, R.; Campos, M. // British Journal of Ophthalmology;Jun2003, Vol. 87 Issue 6, p682 

    Aim: To assess the safety and predictability of photorefractive keratotomy (PRK) and laser in situ keratomileusis (LASIK) based on preoperative corneal topography. Methods: A non-randomised comparative study was carried out on 84 eyes that presented with topographic abnormalities before...

  • IN THE JOURNALS. Limbal marking fails to boost LASIK, LASEK outcomes for myopic astigmatism.  // Ocular Surgery News;10/10/2010, Vol. 28 Issue 19, p67 

    The article discusses research done on preoperative marking of the limbus, which failed to improve refractive outcomes of laser in situ keratomileusis (LASIK) and laser-assisted sub-epithelial keratectomy (LASEK) in eyes with myopic astigmatism, published in a 2010 issue of the "Journal of...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics