IOL Master. Photorefractive keratectomy
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1 89/11/3 : 89/9/3 : 1389 /119 / IOL Master * Photorefractive keratectomy Photorefractive keratectomy(prk) (IOL) :. IoL-Master.. (clinical trial) : PRK. IOL Master ( GM300,china) IOL. PRK. 5. clinical history method Master. student t-test paired t-test 16 SPSS. 23/45±1/ : CHM CHM IOL Master chm IOL master. (0/14±0/ 37-4/73±4/31). CHM 0.86 CHM IOL Master Ĥ :. IOL Master PRK. Clinical History Method Photorefractive keratectomy IOL Master :. razmjoo@med.mui.ac.ir 1359 * :
2 PRK. -3D -7/5D. +3D Cornea-External Ocular (CED) PRK Disease... PRK GM300 IOL Master ( Carl Zeiss Jena GMBH). JenaGermany PRK. IOL Master..(1) 58 Schafer. IOL Master 3. IOL clinical history method. Master.(2) 22 Elbaz Photorefractive keratectomy. ACD (PRK) IOL 3. Master IOL (p<0.01) Master (p<0.01). IOL Master IOL Master.. 0/91 IOL Master.(3) IOL Master IOL-Master 1360
3 .. P<0/05. pearson 10 ( 70) 35 ( 71/5) 25 ( 28/5) : /45 ± 1/55 23/28 ± 1/54 23/9 ± 1/59 ). ((P<) ± 11/ µm 496µm 517/ D -7/25D -2/25D sphere D vertex distance 12mm equivalent -4/52 ± 1/22D sphere equivalent -4/12 ± 1/48D. vertex distance 12mm sphere equivalent +0/25 ± 0/43D sphere 0/15 ± 0/38D equivalent 70. K2.K1. IOL Master clinical history PRK. method(chm) tissue saving. PRK IOL Master.. PRK CED. CHM. IOL IOL Master CHM Javal - master-h diff. H diff Orb-scan PRK i Topcon 3. Topcon PRK. 750i 16 SPSS student t-test paired t-test 1361
4 IOL Master PRK PRK. 45/94 ± 1/22D IOL master student t-test. (P=0/970) 46/31 ± 1/ 18 D student.(p<). Mann-whitney t-test. IOL master-h diff 0/14 ± 0/37 Javal -H diff CHM. 70 CHM -4/73 ± 4/31 student t-test (P<) 38/17 ± 0/71D IOLmaster D PRK IOL master.. 38/43 ± 0/67 D 38/02 ± 0/67 ± 0/86 CHM.(P<0/01) 38/17 70 PRK 3 IOL master..1 38/02 ± 0/67 45 /94 ± 1/ 22 IOL 43/16 ± 1/13 46/31 ± 1/ 18 0/07 ± 0/32-4/13 ± 1/ 29 Sphere 0/30 ± 0/42-0/78 ± 0/ 37 Cylinder CHM.2 P value ± 0/37095 ± 3/ 351 K post-op IOLMaster - K History derived IOLMaster 1/31717 ± 30/ 054 K post-op Javal - K History derived Javal 1/21161 ± 33/ 698 IOL Master H diff - Javal H diff 0/63350 ± 4/ 868 K pre-op IOLMaster - K pre-op Javal 1/28097 ± 33/ 544 K post-op IOLMaster - K post-op Javal 1362
5 IOL Pearson Master.(P<0/01) 0.86 CHM Pearson 0/013 CHM.(2 1 ) 100 PRK /10. 10/10 43/15 ± 1/13D PRK 38/43 ± 0/67D CHM.(P<) wilcoxon. Pearson. CHM IOL Master PRK.1 CHM PRK
6 cosmetic. PRK PRK. CHM K K CHM K IOL Master K CHM. pearson PRK. K CHM K IOL Master (7;6;3) Elbaz IOL Master. IOL Master IOL Master PRK. IOL Master ) ( LASIK LASEK, PRK.. ablation PRK. IOL Master 2/3..(5;4) 4 3. PRK 1364
7 .. PRK IOL -2/25-7/25D. Master.(3). PRK IOL Master correlation.. LASIK LASEK References 1. Basic and Clinical Science Course, : Refractive surgery. American Academy of Ophthalmology, Schafer S, Kurzinger G, Spraul CW, Kampmeier J. [Comparative results of keratometry with three different keratometers after LASIK]. Klin Monbl Augenheilkd 2005 May;222(5): Elbaz U, Barkana Y, Gerber Y, Avni I, Zadok D. Comparison of different techniques of anterior chamber depth and keratometric measurements. Am J Ophthalmol 2007 Jan;143(1): Peter R, Hazeghi M, Job O, Wienecke L, Schipper I. Manual keratometry and videokeratography after photorefractive keratectomy. J Cataract Refract Surg 2000 Dec;26(12): Randleman JB, Loupe DN, Song CD, Waring GO, III, Stulting RD. Intraocular lens power calculations after laser in situ keratomileusis. Cornea 2002 Nov;21(8): Schafer S, Kurzinger G, Spraul CW, Kampmeier J. [Comparative results of keratometry with three different keratometers after LASIK]. Klin Monbl Augenheilkd 2005 May;222(5): Feiz V, Mannis MJ, Garcia-Ferrer F, Kandavel G, Darlington JK, Kim E, et al. Intraocular lens power calculation after laser in situ keratomileusis for myopia and hyperopia: a standardized approach. Cornea 2001 Nov;20(8):
8 Journal of Isfahan Medical School Original Article Vol 28, No 119, 3 rd week, February 2011 Received: Accepted: Comparing Two Keratometer Device Keratometry after Photorefractive Keratectomy in Isfahan* Hasan Razmjoo MD 1, Kobra Nasrollahi MD 2, Farhad Janbaz MD 3, Hamid Fesharaki MD 4, Hosein Attarzadeh MD 2 Abstract Background: One of the reasons that the power of intraocular lens (IOL) after Photorefractive keratectomy (PRK) report lower than the actual amount is an error of measurement of refractive power of cornea by corneal topography system and keratometers. There are Different devices with different accuracy for postoperative keratometry. It is necessary to use a more accuare device. This study aimed to compare IoL-Master keratometer with Zhaval keratometer. Methods: This clinical trial was a prospective study on patients referred for PRK. 35 patients aged 20 to 30, were randomly chosen. Keratometery was done by Zhaval (, china GM300) and the IOL Master system. Three months after PRK another keratometry was done for all of the patients with both devices by an 5 minutes interval. The differences between postoperative clinical history method with IOL Master keratometry and Zhaval keratometry was calculated. SPSS version 16 was used for data analysis and paired t-test and student t-test were performed. Finding: 70 eyes of 35 patients included 10 males and 25 females were studied. The mean age of patients was ± 1.55 years. The difference between postoperative keratometry using IOL Master with keratometry from CHM compared with the difference between Zhaval keratometer from CHM was statistically significant.there was a Significant direct relationship between IOL master keratometry and CHM method (0.86 but Zhaval keratometry had not a significant correlaton with CHM. Conclusion: The result of this study showed that the method obtained by IOL Master are much closer to the CHM, therfor is recommended that for postoperative PRK keratometry IOL Master device should be used. Keywords: IOLMaster keratometry, Zhaval keratometry, Photorefractive keratectomy, Clinical History Method. *This paper drived from a medical Doctorate thesis in Isfahan University of Medical Sciences. 1 Professor, Department of Ophthalmology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran. 2. Assistant Professor of Ophthalmology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran. 3 Student of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran. 4.Associate Professor of Ophthalmology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran. Corresponding Author: Hasan Razmjoo MD, razmjoo@med.mui.ac.ir 1366
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