Volume 4 Issue 2
Apr.  2013
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Ke JIN, Yang JIANG, Ying LI, Yan LUO, Yu-mei JIN, Feng-rong AI. Influence of Different Surgery Types and Ablation Ratios on the Change of Corneal Topography After Excimer Laser Refractive Surgery[J]. Medical Journal of Peking Union Medical College Hospital, 2013, 4(2): 154-159. doi: 10.3969/j.issn.1674-9081.2013.02.015
Citation: Ke JIN, Yang JIANG, Ying LI, Yan LUO, Yu-mei JIN, Feng-rong AI. Influence of Different Surgery Types and Ablation Ratios on the Change of Corneal Topography After Excimer Laser Refractive Surgery[J]. Medical Journal of Peking Union Medical College Hospital, 2013, 4(2): 154-159. doi: 10.3969/j.issn.1674-9081.2013.02.015

Influence of Different Surgery Types and Ablation Ratios on the Change of Corneal Topography After Excimer Laser Refractive Surgery

doi: 10.3969/j.issn.1674-9081.2013.02.015
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  • Corresponding author: LI Ying Tel: 010-69156351, E-mail:liyingpumch@sohu.com
  • Received Date: 2013-01-30
  • Publish Date: 2013-04-30
  •   Objective  To analyze the change of corneal topography after excimer laser photorefractive keratectomy and the influence of surgery types and ablation ratios.  Methods  A total of 52 myopic patients (103 eyes) underwent excimer laser refractive surgery in our hospital from August 2008 to February 2009. The patients were grouped by the type of surgery:laser in situ keratomileusis (LASIK) group (27 patients, 53 eyes) and advanced surface ablation (ASA) group (25 cases, 50 eyes). In both groups, the patients were subgrouped by ablation depth/corneal thickness ratio (AD/CT):subgroup 1 (AD/CT ≤ 0.15) and subgroup 2 (AD/CT > 0.15). Routine ophthalmological examinations and corneal topography were performed before operation and 1 week, 1 month, and 3 months after operation. The main outcome measures included surface asymmetry index (SAI), surface regularity index (SRI), Δsimulated keratoscopy reading (ΔSimK), and simulated keratoscopy reading (SimK).  Results  In subgroups L2 and A2, all the three postoperative SAI values improved significantly compared with preoperative values (P=0.000), but not in subgroups L1 and A1 (P>0.05). In subgroup L2, the SRI value improved significantly 1 week after surgery (P=0.010), but not after 1 month and 3 months (P > 0.05). In subgroup A2, the SRI values improved significantly 1 week and 1 month after surgery (P=0.000, P=0.005), but not after 3 months (P > 0.05). The SRI showed no significant difference among different time points in both subgroup L1 and A1 (P > 0.05). In all patients, both ΔSimK and SimK equivalent value decreased significantly after the operation (P=0.000). The changes of SAI and ΔSimK were influenced by both surgery type and the ablation ratio (P < 0.05), while the changes of SRI and SimK equivalent only by ablation ratio (P < 0.05).  Conclusions  The postoperative corneal topographic parameters change after excimer laser refractive surgery. The changes after LASIK are larger than those after advanced surface ablation, and the changes increase with the ablation ratio.
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  • [1] Pavan-Langston D. Manual of ocular diagnosis and therapy[M]. Hagerstown:Lippincott Williams & Wilkins, 2007:405.
    [2] Liu Z, Li Y, Cheng Z, et al. Seven-year follow-up of lasik for moderate to severe myopia[J]. J Refract Surg, 2008, 24:935-940. doi:  10.3928/1081597X-20081101-13
    [3] Duffey RJ, Leaming D. US trends in refractive surgery:2004 ISRS/AAO Survey[J]. J Refract Surg, 2005, 21:742-748. doi:  10.3928/1081-597X-20051101-14
    [4] Pallikaris IG, Kalyvianaki MI, Katsanevaki VJ, et al. EpiLASIK:preliminary clinical results of an alternative surface ablation procedure[J]. J Cataract Refract Surg, 2005, 31:879-885. doi:  10.1016/j.jcrs.2004.09.052
    [5] Hondur A, Bilgihan K, Hasanreisoglu B. A prospective bilateral comparison of epi-LASIK and LASEK for myopia[J]. J Refract Surg, 2008, 24:928-934. doi:  10.3928/1081597X-20081101-12
    [6] Morrow GL, Stein RM. Evaluation of corneal topography:past, present and future trends[J]. Can J Ophthalmol, 1992, 27:213-225. http://europepmc.org/abstract/MED/1393805
    [7] Brody J, Waller S, Wagoner M. Corneal topography:history, technique, and clinical uses[J]. Int Ophthalmol Clin, 1994, 34:197-207. doi:  10.1097/00004397-199403430-00018
    [8] Fowler CW, Dave TN. Review of past and present techniques of measuring corneal topography[J]. Ophthalmic Physiol Opt, 1994, 14:49-58. doi:  10.1111/j.1475-1313.1994.tb00556.x
    [9] Pholshivin P, Tangpagasit W. Comparison of central corneal thickness measurements by ultrasound pachymeter, optical coherence tomography and corneal topography[J]. J Med Assoc Thai, 2012, 95:123-128. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=10.1080/02713683.2018.1461910
    [10] Srivannaboon S, Chotikavanich S, Chirapapaisan C, et al. Precision analysis of posterior corneal topography measured by Visante Omni:repeatability, reproducibility, and agreement with Orbscan Ⅱ[J]. J Refract Surg, 2012, 28:133-138. doi:  10.3928/1081597X-20111122-03
    [11] Módis L Jr, Szalai E, Kolozsvári B, et al. Keratometry evaluations with the Pentacam high resolution in comparison with the automated keratometry and conventional corneal topography[J]. Cornea, 2012, 31:36-41. doi:  10.1097/ICO.0b013e318204c666
    [12] Scerrati E. Laser in situ keratomileusis vs. laser epithelial keratomileusis (LASIK vs. LASEK)[J]. J Refract Surg, 2001, 17:S219-S221. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=d313ae98d65bcd13726686d2e346ef8c
    [13] Andreassen TT, Simonsen AH, Oxlund H. Biomechanical properties of keratoconus and normal corneas[J]. Exp Eye Res, 1980, 31:435-441. doi:  10.1016/S0014-4835(80)80027-3
    [14] Charman WN. Mismatch between flap and stromal areas after laser in situ keratomileusis as source of flap striae[J]. J Cataract Refract Surg, 2002, 28:2146-2152. doi:  10.1016/S0886-3350(02)01636-X
    [15] Ustundag C, Bahcecioglu H, Ozdamar A, et al. Optical coherence tomography for evaluation of anatomical changes in the cornea after laser in situ keratomileusis[J]. J Cataract Refract Surg, 2000, 26:1458-1462. doi:  10.1016/S0886-3350(00)00558-7
    [16] de Benito-Llopis L, Teus MA, Sanchez-Pina JM, et al. Comparison between LASEK and LASIK for the correction of low myopia[J]. J Refract Surg, 2007, 23:139-145. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=d8a0c876ceb04a179afc379a4745f2fb
    [17] Chen MC, Lee N, Bourla N, et al. Corneal biomechanical measurements before and after laser in situ keratomileusis[J]. J Cataract Refract Surg, 2008, 34:1886-1891. doi:  10.1016/j.jcrs.2008.06.035
    [18] Hamilton DR, Johnson RD, Lee N, et al. Differences in the corneal biomechanical effects of surface ablation compared with laser in situ keratomileusis using a microkeratome or femtosecond laser[J]. J Cataract Refract Surg, 2008, 34:2049-2056. doi:  10.1016/j.jcrs.2008.08.021
    [19] Brenner LF, Alió JL, Vega-Estrada A, et al. Clinical grading of post-LASIK ectasia related to visual limitation and predictive factors for vision loss[J]. J Cataract Refract Surg, 2012, 38:1817-1826. doi:  10.1016/j.jcrs.2012.05.041
    [20] Lee DH, Seo S, Jeong KW, et al. Early spatial changes in the posterior corneal surface after laser in situ keratomileusis[J]. J Cataract Refract Surg, 2003, 29:778-784. doi:  10.1016/S0886-3350(02)01842-4
    [21] Baek TM, Lee KH, Tomidokoro A, et al. Corneal irregular astigmatism after laser in situ keratomileusis for myopia[J]. Br J Ophthalmol, 2001, 85:534-536. doi:  10.1136/bjo.85.5.534
    [22] Anera RG, Castro JJ, Jiménez JR, et al. Optical quality and visual discrimination capacity after myopic LASIK with a standard and aspheric ablation profile[J]. Refract Surg, 2011, 27:597-601. doi:  10.3928/1081597X-20110303-01
    [23] Bühren J, Nagy L, Yoon G, et al. The effect of the asphericity of myopic laser ablation profiles on the induction of wavefr ont aberrations[J]. Invest Ophthalmol Vis Sci, 2010, 51:2805-2812. doi:  10.1167/iovs.09-4604
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