Clinical Outcomes After Continuous Intracorneal Ring implantation in Post-LASIK Ectasia: (Long-Term Follow-up)
Journal of Ophthalmic and Optometric Sciences,
Vol. 1 No. 3 (2017),
29 November 2017
,
Page 13-20
https://doi.org/10.22037/joos.v1i3.20266
Abstract
Purpose: The aim of the present study was to evaluate the clinical outcomes after implantation of MyoRing in patients with ectasia secondary to LASIK.
Patients and Methods: This study was a retrospective, consecutive, nonrandomized interventional case series. The MyoRing was implanted after creation of a stromal pocket using a PocketMaker microkeratome (Dioptex, GmBH, Linz, Austria) in 6 eyes of 6 patients with ectasia secondary to LASIK. Uncorrected distance visual acuity, corrected distance visual acuity, sphere, cylinder and keratometric changes were reported after a 3 year follow-up period.
Results: Uncorrected distance visual acuity and corrected distance visual acuity were improved in 5 and 3 patients respectively. One patient showed decreased UDVA after 3 years and in 3 patients the corrected distance visual acuity decreased at the last visit compared to the preoperative reading. Maximum keratometry, sphere and cylinder were improved from preoperative values in 4, 2 and 5 patients respectively.
Conclusion: Because of the mixed results in our small group of patients, it seems that MyoRing implantation using mechanical dissection is not a very effective method for treatment of patients with post LASIK ectasia. However, large comparative multicenter studies are recommended to further verify these results.
Keywords: Ectasia, Cornea, LASIK, Corneal ring, Iran.
How to Cite
References
Geggel HS, Talley AR. Delayed onset keratectasia following laser in situ keratomileusis. J Cataract Refract Surg. 1999;25(4):582-6.
Rao SN, Epstein RJ. Early onset ectasia following laser in situ keratomileusus: case report and literature review. J Refract Surg. 2002;18(2):177-84.
Lifshitz T, Levy J, Klemperer I, Levinger S. Late bilateral keratectasia after LASIK in a low myopic patient. J Refract Surg. 2005;21(5):494-6.
Randleman JB, Russell B, Ward MA, Thompson KP, Stulting RD. Risk factors and prognosis for corneal ectasia after LASIK. Ophthalmology. 2003;110(2):267-75.
Rad AS, Jabbarvand M, Saifi N. Progressive keratectasia after laser in situ keratomileusis. J Refract Surg. 20(5 Suppl):S718-22.
Pallikaris IG, Kymionis GD, Astyrakakis NI. Corneal ectasia induced by laser in situ keratomileusis. J Cataract Refract Surg. 2001;27(11):1796-802.
Binder PS, Lindstrom RL, Stulting RD, Donnenfeld E, Wu H, McDonnell P, et al. Keratoconus and corneal ectasia after LASIK. J Cataract Refract Surg. 2005;31(11):2035-8.
Randleman JB, Woodward M, Lynn MJ, Stulting RD. Risk assessment for ectasia after corneal refractive surgery. Ophthalmology. 2008;115(1):37-50.
Rabinowitz YS. Videokeratographic indices to aid in screening for keratoconus. J Refract Surg. 1995;11(5):371-9.
Kohlhaas M, Spoerl E, Schilde T, Unger G, Wittig C, Pillunat LE. Biomechanical evidence of the distribution of cross-links in corneas treated with riboflavin and ultraviolet A light. J Cataract Refract Surg. 2006;32(2):279-83.
Amoils SP, Deist MB, Gous P, Amoils PM. Iatrogenic keratectasia after laser in situ keratomileusis for less than -4.0 to -7.0 diopters of myopia. J Cataract Refract Surg. 2000;26(7):967-77.
Marsack JD, Parker KE, Niu Y, Pesudovs K, Applegate RA. On-eye performance of custom wavefront-guided soft contact lenses in a habitual soft lens-wearing keratoconic patient. J Refract Surg. 2007;23(9):960-4.
Kamburoglu G, Ertan A. Intacs implantation with sequential collagen cross-linking treatment in postoperative LASIK ectasia. J Refract Surg. 2008; 24(7):S726-9.
Vinciguerra P, Camesasca FI, Albe E, Trazza S. Corneal collagen cross-linking for ectasia after excimer laser refractive surgery: 1-year results. J Refract Surg. 2010;26(7):486-97.
Kymionis GD, Kontadakis GA, Kounis GA, Portaliou DM, Karavitaki AE, Magarakis M, et al. Simultaneous topography-guided PRK followed by corneal collagen cross-linking for keratoconus. J Refract Surg. 2009; 25(9):S807-11.
Kanellopoulos AJ. Comparison of sequential vs same-day simultaneous collagen cross-linking and topography-guided PRK for treatment of keratoconus. J Refract Surg. 2009 ;25(9):S812-8. 17. Bromley JG, Randleman JB. Treatment strategies for corneal ectasia. Curr Opin Ophthalmol. 2010;21(4):255-8.
Ferrara P, Torquetti L. Clinical outcomes after implantation of a new intrastromal corneal ring with a 210-degree arc length. J Cataract Refract Surg. 2009;35(9):1604-8.
Pinero DP, Alio JL, Uceda-Montanes A, El Kady B, Pascual I. Intracorneal ring segment implantation in corneas with post-laser in situ keratomileusis keratectasia. Ophthalmology. 2009; 116(9):1665-74.20.
Mahmood H, Venkateswaran RS, Daxer A. Implantation of a complete corneal ring in an intrastromal pocket for keratoconus. J Refract Surg. 2011;27(1):63-8.
Daxer A. Adjustable intracorneal ring in a lamellar pocket for keratoconus. J Refract Surg. 2010;26(3):217-21.
Daxer A, Mahmoud H, Venkateswaran RS. Intracorneal continuous ring implantation for keratoconus: One-year follow-up. J Cataract Refract Surg. 2010;36(8):1296-302.
Jabbarvand M, Salamatrad A, Hashemian H, Khodaparast M. Continuous corneal intrastromal ring implantation for treatment of keratoconus in an Iranian population. Am J Ophthalmol.2013;155(5):837-42.
Daxer A. Corneal intrastromal implantation surgery for the treatment of moderate and high myopia. J Cataract Refract Surg. 2008;34(2):194-8.
Daxer A, Misof K, Grabner B, Ettl A, Fratzl P. Collagen fibrils in the human corneal stroma: structure and aging. Invest Ophthalmol Vis Sci. 1998;39(3):644-8.
Jadidi K, Mosavi SA, Nejat F, Naderi M, Janani L, Serahati S. Intrastromal corneal ring segment implantation (keraring 355 degrees ) in patients with central keratoconus: 6-month follow-up. J Ophthalmol.2015;2015:916385.
Jabbarvand M, Hashemian M, Hashemian H, Bazvand F, Khodaparast M. Femtosecond laser-assisted MyoRing implantation in postoperative LASIK ectasia. J Refract Surg. 2014;30(7):462-6.
Jabbarvand M, Salamatrad A, Hashemian H, Mazloumi M, Khodaparast M. Continuous intracorneal ring implantation for keratoconus using a femtosecond laser. J Cataract Refract Surg. 2013;39(7):1081-7.
Alio JL, Pinero DP, Daxer A. Clinical outcomes after complete ring implantation in corneal ectasia using the femtosecond technology: a pilot study. Ophthalmology. 2011;118(7):1282-90.
Kirwan C, O'Keefe M. Corneal hysteresis using the Reichert ocular response analyser: findings pre- and post-LASIK and LASEK. Acta Ophthalmol. 2008;86(2):215-8.
Pepose JS, Feigenbaum SK, Qazi MA, Sanderson JP, Roberts CJ. Changes in corneal biomechanics and intraocular pressure following LASIK using static, dynamic, and noncontact tonometry. Am J Ophthalmol.2007;143(1):39-47.
Qazi MA, Sanderson JP, Mahmoud AM, Yoon EY, Roberts CJ, Pepose JS. Postoperative changes in intraocular pressure and corneal biomechanical metrics Laser in situ keratomileusis versus laser-assisted subepithelial keratectomy. J Cataract Refract Surg. 2009;35(10):1774-88.
Kamiya K, Shimizu K, Ohmoto F. Comparison of the changes in corneal biomechanical properties after photorefractive keratectomy and laser in situ keratomileusis. Cornea. 2009;28(7):765-9.
Shah S, Laiquzzaman M. Comparison of corneal biomechanics in pre and post-refractive surgery and keratoconic eyes by Ocular Response Analyser. Cont Lens Anterior Eye. 2009;32(3):129-32.
Garcia-Porta N, Fernandes P, Queiros A, Salgado-Borges J, Parafita-Mato M, Gonzalez-Meijome JM. Corneal biomechanical properties in different ocular conditions and new measurement techniques. ISRN Ophthalmol. 2014;2014:724546.
Ortiz D, Pinero D, Shabayek MH, Arnalich-Montiel F, Alio JL. Corneal biomechanical properties in normal, post-laser in situ keratomileusis, and keratoconic eyes. J Cataract Refract Surg. 2007;33(8):1371-5.
Chen S, Chen D, Wang J, Lu F, Wang Q, Qu J. Changes in ocular response analyzer parameters after LASIK. J Refract Surg. 2010;26(4):279-88.
Ortiz D, Alio JL, Pinero D. Measurement of corneal curvature change after mechanical laser in situ keratomileusis flap creation and femtosecond laser flap creation. J Cataract Refract Surg. 2008;34(2):238-42.
Jaycock PD, Lobo L, Ibrahim J, Tyrer J, Marshall J. Interferometric technique to measure biomechanical changes in the cornea induced by refractive surgery. J Cataract Refract Surg. 2005;31(1):175-84.
Hjortdal JO, Moller-Pedersen T, Ivarsen A, Ehlers N. Corneal power, thickness, and stiffness: results of a prospective randomized controlled trial of PRK and LASIK for myopia. J Cataract Refract Surg. 2005;31(1):21-9.
- Abstract Viewed: 183 times
- PDF Downloaded: 87 times
