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Effects of optimized photorefractive keratectomy (PRK) operation on the asphericity and high-order aberration changes
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Ali Zare Joshaghani1    , Alireza Baradaran Rafii2 , Farhad Adhami Moghaddam 3 |
1- Young Researchers and Elite Club, Islamic Azad University, Tehran Medical Sciences Branch, Tehran, Iran
2- Ophthalmic Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
3- Department of Ophthalmology, School of Medicine, Islamic Azad University Tehran Medical Sciences, Tehran, Iran , farhad.adhami@gmail.com |
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Abstract: (1781 Views) |
Background: Optimized is a common and important method in which aberrations are created by the device and the surgeon, but high-grade aberrations are out of the surgeon's control and are induced by the device in the patient. The aim of this study was the evaluation of out-of-control high-order aberration changes before and after PRK surgery and these impact on vision outcome.
Materials and methods: In this before and after clinical trial study, we recurred 24 patients consist of 48 eyes. For the patients with myopic astigmatism, before the operation, a complete visual examination (visual acuity, refraction, etc.) and imaging including orbscan, zywave, and topolyzer were performed and tests were repeated six months after surgery. The results were compared before and after surgery.
Results: 24 patients included 8 males (33.3%) and 16 females (66.7%) with a mean age of 29±5 years recurred in the study. The total higher-order aberration increased after operation. There was no significant difference between the third and fourth-order corneal
aberrations before and after the operation. The ocular and corneal high-order aberration was increased. Mean asphericity was similar before and after the operation. Also, significant correlations among spherical equivalent, total high order abbration, and occular abbaration were found.
Conclusion: Regarding our study, eye sporadic defect improved after the operation but it would never achieve the optimal goal. According to the findings, it seems that the optimized method with the Allegretto EX500 device, despite its superiority over the conventional method, still induces high-grade aberrations and changes the asphericity from prolate to oblate mode. However, it improves refraction, which affects the quality of patients' vision. |
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| Keywords: Asphericity, High-order aberration, Optimized PRK. |
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Full-Text [PDF 663 kb]
(654 Downloads)
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Semi-pilot: Experimental |
Subject:
Ophtalmology
Received: 2021/02/16 | Accepted: 2021/05/9 | Published: 2021/12/1
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Surgical Correction of Different Severities of Astigmatism Using Wavefront-Optimized Photorefractive Keratectomy Int J Psychosoc Rehabil 2020; 42: 7489-505. [ DOI:10.37200/IJPR/V24I5/PR2020783] 6. Schwiegerling J. Theoretical limits to visual performance Surv Ophthalmol 2000; 45: 139-46. [ DOI:10.1016/S0039-6257(00)00145-4] 7. Sinjab MM. Five Steps to Start Your Refractive Surgery: A Case-Based Systematic Approach: JP Medical Ltd 2014. [ DOI:10.5005/jp/books/12235] 8. Molchan RP, Taylor KR, Panday VA, Caldwell MC, Reilly CD. Retrospective analysis comparing the preoperative and postoperative "Q" values for 2 different lasers in refractive surgery Cornea 2015; 34: 1437-40. [ DOI:10.1097/ICO.0000000000000611] 9. Chandhrasri S, Knorz MC. Comparison of Higher Order Aberrations and Contrast Sensitivity After LASIK, Verisyse Phakic 1OL, and Array Multifocal IOL J Refract Surg 2006; 22: 231-6. [ DOI:10.3928/1081-597X-20060301-06] 10. Khalifa MA, Alsahn MF, Shaheen MS, Pinero DP. 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A prospective, randomized, fellow eye comparison of WaveLight® Allegretto Wave® Eye-Q versus VISX CustomVue™ STAR S4 IR™ in laser in situ keratomileusis (LASIK): analysis of visual outcomes and higher order aberrations Clin ophthalmol 2011; 5: 1339. [ DOI:10.2147/OPTH.S24316] 15. Khan MS, Humayun S, Fawad A, Ishaq M, Arzoo S, Mashhadi F. Effect of wavefront optimized LASIK on higher order aberrations in myopic patients Pakistan J Med Sci 2015; 31: 1223. [ DOI:10.12669/pjms.315.7683] 16. Han DC, Chen J, Htoon HM, Tan DT, Mehta JS. Comparison of outcomes of conventional WaveLight® Allegretto Wave® and Technolas® excimer lasers in myopic laser in situ keratomileusis Clin Ophthalmol 2012; 6: 1159. [ DOI:10.2147/OPTH.S29660] 17. Stojanovic A, Wang L, Nitter TA, Jankov MR, Wang Q. Wavefront optimized versus custom-Q treatments in surface ablation for myopic astigmatism with the WaveLight ALLEGRETTO laser J Refract Surg 2008; 24: 779-89. [ DOI:10.3928/1081597X-20081001-03] 18. Smadja D, Santhiago MR, Mello GR, Touboul D, Mrochen M, Krueger RR. Corneal higher order aberrations after myopic wavefront-optimized ablation J Refract Surg 2013; 29: 42-8. [ DOI:10.3928/1081597X-20121210-03] 19. Wu P-C, Huang H-M, Yu H-J, Fang P-C, Chen C-T. Epidemiology of myopia Asia. Pac J Ophthalmol 2016; 5: 386-93. [ DOI:10.1097/APO.0000000000000236] 20. Tiwari NN, Sachdev GS, Ramamurthy S, Dandapani R. Comparative analysis of visual outcomes and ocular aberrations following wave front optimized and topography-guided customized femtosecond laser in situ keratomileusis for myopia and myopic astigmatism: a contralateral eye study. Indian J Ophthalmol 2018; 66: 1558. [ DOI:10.4103/ijo.IJO_507_18] 21. Cennamo G, Menna F, Sinisi F, Cennamo G, Breve MA, Napolitano P, et al. Twenty-Year Follow-Up of Excimer Laser Photorefractive Keratectomy: A Retrospective Observational Study. Ophthalmol Ther 2020: 1-11. [ DOI:10.1007/s40123-020-00281-7] 22. Seiler T, McDonnell PJ. Excimer laser photorefractive keratectomy. Surv Ophthalmol 1995; 40: 89-118. [ DOI:10.1016/S0039-6257(95)80001-8] 23. Sharghi A, Oujaghi H, Yavari Saba, Moghadam TZ. Surgical Correction of Different Severities of Astigmatism Using Wavefront-Optimized Photorefractive Keratectomy. Int J Psychosoc Rehabil 2020; 42: 7489-505. [ DOI:10.37200/IJPR/V24I5/PR2020783] 24. Schwiegerling J. Theoretical limits to visual performance. Surv Ophthalmol 2000; 45: 139-46. [ DOI:10.1016/S0039-6257(00)00145-4] 25. Sinjab MM. Five Steps to Start Your Refractive Surgery: A Case-Based Systematic Approach. 1st ed. New Delhi, India: Jaypee Brothers Medical Pub; 2014. [ DOI:10.5005/jp/books/12235_1] 26. Molchan RP, Taylor KR, Panday VA, Caldwell MC, Reilly CD. Retrospective analysis comparing the preoperative and postoperative "Q" values for 2 different lasers in refractive surgery. Cornea 2015; 34: 1437-40. [ DOI:10.1097/ICO.0000000000000611] 27. Chandhrasri S, Knorz MC. Comparison of Higher Order Aberrations and Contrast Sensitivity after LASIK, Verisyse phakic 1OL, and Array multifocal IOL. J Refract Surg 2006; 22: 231-6. [ DOI:10.3928/1081-597X-20060301-06] 28. Khalifa MA, Alsahn MF, Shaheen MS, Pinero DP. Comparative analysis of the efficacy of astigmatic correction after wavefront-guided and wavefront-optimized LASIK in low and moderate myopic eyes. Int J Ophthalmol 2017; 10: 285. 29. Sáles CS, Manche EE. One-year eye-to-eye comparison of wavefront-guided versus wavefront-optimized laser in situ keratomileusis in hyperopes. Clin Ophthalmol 2014; 8: 2229. [ DOI:10.2147/OPTH.S70145] 30. Sia RK, Ryan DS, Stutzman RD, Pasternak JF, Eaddy JB, Logan LA, et al. Wavefront-guided versus wavefront-optimized photorefractive keratectomy: Clinical outcomes and patient satisfaction. J Cataract Refract Surg 2015; 41: 2152-64. [ DOI:10.1016/j.jcrs.2015.10.054] 31. Padmanabhan P, Basuthkar SS, Joseph R. Ocular aberrations after wavefront optimized LASIK for myopia. Indian J Ophthalmol 2010; 58: 307. [ DOI:10.4103/0301-4738.64139] 32. Moshirfar M, Betts BS, Churgin DS, Hsu M, Neuffer M, Sikder S, et al. A prospective, randomized, fellow eye comparison of WaveLight® Allegretto Wave® Eye-Q versus VISX CustomVue™ STAR S4 IR™ in laser in situ keratomileusis (LASIK): analysis of visual outcomes and higher order aberrations. Clin ophthalmol 2011; 5: 1339. [ DOI:10.2147/OPTH.S24316] 33. Khan MS, Humayun S, Fawad A, Ishaq M, Arzoo S, Mashhadi F. Effect of wavefront optimized LASIK on higher order aberrations in myopic patients Pakistan. J Med Sci 2015; 31: 1223. [ DOI:10.12669/pjms.315.7683] 34. Han DC, Chen J, Htoon HM, Tan DT, Mehta JS. Comparison of outcomes of conventional WaveLight® Allegretto Wave® and Technolas® excimer lasers in myopic laser in situ keratomileusis. Clin Ophthalmol 2012; 6: 1159. [ DOI:10.2147/OPTH.S29660] 35. Stojanovic A, Wang L, Nitter TA, Jankov MR, Wang Q. Wavefront optimized versus custom-Q treatments in surface ablation for myopic astigmatism with the WaveLight ALLEGRETTO laser. J Refract Surg 2008; 24: 779-89. [ DOI:10.3928/1081597X-20081001-03] 36. Smadja D, Santhiago MR, Mello GR, Touboul D, Mrochen M, Krueger RR. Corneal higher order aberrations after myopic wavefront-optimized ablation. J Refract Surg 2013; 29: 42-8. [ DOI:10.3928/1081597X-20121210-03] |
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Zare Joshaghani A, Baradaran Rafii A, Adhami Moghaddam F. Effects of optimized photorefractive keratectomy (PRK) operation on the asphericity and high-order aberration changes. MEDICAL SCIENCES 2021; 31 (4) :425-431 URL: http://tmuj.iautmu.ac.ir/article-1-1821-en.html
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