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Curr Eye Res ; 45(9): 1036-1042, 2020 09.
Artigo em Inglês | MEDLINE | ID: mdl-32027190

RESUMO

PURPOSE: To compare the differences in higher-order aberrations (HOAs) after laser subepithelial keratomileusis (LASEK) between two different laser platforms. METHODS: One hundred and seven eyes of 107 patients were included in this study. Fifty-six eyes underwent LASEK with the Triple-A profile (an ablation profile of the MEL 90 excimer laser) and 51 eyes underwent LASEK with the aspheric (Aberration Smart Ablation [ASA]) profile. Uncorrected distance visual acuity, corrected distance visual acuity (CDVA), corneal topography, and ocular aberrations were measured before and 6 months postoperatively. RESULTS: In the ASA group, the values of horizontal trefoil, vertical coma, horizontal coma, spherical aberrations, and total HOAs increased significantly after surgery (all P < 0.05). There were no significant differences in the vertical trefoil between the preoperative and 6-month postoperative periods. In the Triple-A group, there were no differences in vertical trefoil and horizontal trefoil values between the preoperative and 6-month postoperative periods. Compared with the preoperative values, vertical coma, horizontal coma, spherical aberrations, and total HOAs were significantly increased at 6 months after surgery (all P < 0.05). Compared to the Triple-A group, higher horizontal trefoil and horizontal coma were introduced in the ASA group at 6 months postoperatively. CONCLUSION: The Triple-A ablation profile of the MEL 90 excimer laser at a 500-Hz pulse rate was an efficient method to correct myopia, especially for mild-to-moderate myopia, compared with the aspheric ablation model, fewer horizontal trefoil and horizontal coma were induced at 6 months after LASEK. ABBREVIATIONS: HOAs, Higher-Order Aberrations; LASEK, laser subepithelial keratomileusis; ASA, Aberration Smart Ablation; UDVA, uncorrected distance visual acuity; CDVA, corrected distance visual acuity.


Assuntos
Aberrações de Frente de Onda da Córnea/etiologia , Ceratectomia Subepitelial Assistida por Laser/efeitos adversos , Lasers de Excimer/efeitos adversos , Miopia/cirurgia , Adolescente , Adulto , Topografia da Córnea , Aberrações de Frente de Onda da Córnea/fisiopatologia , Feminino , Humanos , Masculino , Miopia/fisiopatologia , Estudos Prospectivos , Refração Ocular/fisiologia , Acuidade Visual/fisiologia , Adulto Jovem
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