{"title":"半圆柱形消融模式避免激光屈光手术不良反应的激光非对称角膜切除术","authors":"Ji Sang Min, B. Min, Dong Cho Lee","doi":"10.26420/austinjclinopthalmol.2021.1120","DOIUrl":null,"url":null,"abstract":"Purpose: This study aimed to present a novel technique for Laser Epithelial Keratomileusis (LASEK)-Linked Laser Asymmetric Keratectomy using a Semi- Cylindrical Ablation Pattern (L-LAK-SCAP) that can prevent adverse effects following LASEK and simultaneously improve refractive errors and corneal symmetry. Design: This is a single-center retrospective study. Methods: We retrospectively compared the postoperative 1-year clinical results after LASEK only or L-LAK-SCAP for each group of 42 eyes of 21 patients with myopia, with a sum of deviations in the corneal thickness in four directions (SUM) on the Orbscan map of >80multaneously corrected the refractivem. L-LAK-SCAP simultaneously corrected the refractive error (LASEK) and myopic shift by selectively ablating thicker cornea (by LAK), thereby improving corneal symmetry and visual acuity concomitantly. Results: The following measures were similar in both groups (p >0.05): preoperative age, Spherical Equivalent (SE), cylinder, Uncorrected Distance Visual Acuity (UDVA), pupil size, Intraocular Pressure (IOP), and corneal symmetry on Orbscan map. At 1-year postoperatively, the L-LAK-SCAP group showed better results, and the following measures differed significantly between the two groups: SE (p=0.024), UDVA (p=0.001), kappa angle (p=0.030), corneal irregularities in the 3.0mm and 5.0mm zones on the Orbscan map (p=0.033 and 0.034, respectively), SUM (p=0.000), the distance between the maximum posterior elevation (best-fit-sphere) and the visual axis (DISTANCE) (p=0.040), blurring scores (p=0.000), and myopic regression (p=0.004). Conclusion: L-LAK-SCAP improved corneal symmetry, was associated with excellent outcomes, and may prevent adverse events following LASEK.","PeriodicalId":90447,"journal":{"name":"Austin journal of clinical ophthalmology","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2021-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Laser Asymmetric Keratectomy Using a Semi-Cylindrical Ablation Pattern to Avoid Adverse Effects of Laser Refractive Surgery\",\"authors\":\"Ji Sang Min, B. Min, Dong Cho Lee\",\"doi\":\"10.26420/austinjclinopthalmol.2021.1120\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Purpose: This study aimed to present a novel technique for Laser Epithelial Keratomileusis (LASEK)-Linked Laser Asymmetric Keratectomy using a Semi- Cylindrical Ablation Pattern (L-LAK-SCAP) that can prevent adverse effects following LASEK and simultaneously improve refractive errors and corneal symmetry. Design: This is a single-center retrospective study. Methods: We retrospectively compared the postoperative 1-year clinical results after LASEK only or L-LAK-SCAP for each group of 42 eyes of 21 patients with myopia, with a sum of deviations in the corneal thickness in four directions (SUM) on the Orbscan map of >80multaneously corrected the refractivem. L-LAK-SCAP simultaneously corrected the refractive error (LASEK) and myopic shift by selectively ablating thicker cornea (by LAK), thereby improving corneal symmetry and visual acuity concomitantly. Results: The following measures were similar in both groups (p >0.05): preoperative age, Spherical Equivalent (SE), cylinder, Uncorrected Distance Visual Acuity (UDVA), pupil size, Intraocular Pressure (IOP), and corneal symmetry on Orbscan map. At 1-year postoperatively, the L-LAK-SCAP group showed better results, and the following measures differed significantly between the two groups: SE (p=0.024), UDVA (p=0.001), kappa angle (p=0.030), corneal irregularities in the 3.0mm and 5.0mm zones on the Orbscan map (p=0.033 and 0.034, respectively), SUM (p=0.000), the distance between the maximum posterior elevation (best-fit-sphere) and the visual axis (DISTANCE) (p=0.040), blurring scores (p=0.000), and myopic regression (p=0.004). Conclusion: L-LAK-SCAP improved corneal symmetry, was associated with excellent outcomes, and may prevent adverse events following LASEK.\",\"PeriodicalId\":90447,\"journal\":{\"name\":\"Austin journal of clinical ophthalmology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2021-12-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Austin journal of clinical ophthalmology\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.26420/austinjclinopthalmol.2021.1120\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Austin journal of clinical ophthalmology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.26420/austinjclinopthalmol.2021.1120","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Laser Asymmetric Keratectomy Using a Semi-Cylindrical Ablation Pattern to Avoid Adverse Effects of Laser Refractive Surgery
Purpose: This study aimed to present a novel technique for Laser Epithelial Keratomileusis (LASEK)-Linked Laser Asymmetric Keratectomy using a Semi- Cylindrical Ablation Pattern (L-LAK-SCAP) that can prevent adverse effects following LASEK and simultaneously improve refractive errors and corneal symmetry. Design: This is a single-center retrospective study. Methods: We retrospectively compared the postoperative 1-year clinical results after LASEK only or L-LAK-SCAP for each group of 42 eyes of 21 patients with myopia, with a sum of deviations in the corneal thickness in four directions (SUM) on the Orbscan map of >80multaneously corrected the refractivem. L-LAK-SCAP simultaneously corrected the refractive error (LASEK) and myopic shift by selectively ablating thicker cornea (by LAK), thereby improving corneal symmetry and visual acuity concomitantly. Results: The following measures were similar in both groups (p >0.05): preoperative age, Spherical Equivalent (SE), cylinder, Uncorrected Distance Visual Acuity (UDVA), pupil size, Intraocular Pressure (IOP), and corneal symmetry on Orbscan map. At 1-year postoperatively, the L-LAK-SCAP group showed better results, and the following measures differed significantly between the two groups: SE (p=0.024), UDVA (p=0.001), kappa angle (p=0.030), corneal irregularities in the 3.0mm and 5.0mm zones on the Orbscan map (p=0.033 and 0.034, respectively), SUM (p=0.000), the distance between the maximum posterior elevation (best-fit-sphere) and the visual axis (DISTANCE) (p=0.040), blurring scores (p=0.000), and myopic regression (p=0.004). Conclusion: L-LAK-SCAP improved corneal symmetry, was associated with excellent outcomes, and may prevent adverse events following LASEK.