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Comparison of preoperative simulated and postoperative real safety distances using anterior segment oct in patients with phakic IOL according to iris configuration

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International Journal of Ophthalmology(English edition) 2022年第5期15卷 741-746页

作者： Maria A Henriquez Maythe Camino-Quezada Or Ben-Shaul Luis Izquierdo Jr Research Department Oftalmosalud Institute of EyesSan IsidroLima 27Perú

AIM:To compare the simulated safe distance(SSD)preoperatively versus real safe distance(RSD)postoperatively in patients with iris-claw phakic intraocular lens(p IOL)implantation according to iris ***:Totally 60 eyes of 60 patients underwent p IOL implantation for surgical correction of *** chamber depth(ACD)was measured with the IOLMaster 700,and nasal and temporal safety distances(SD)were measured pre-and postoperatively using anterior segment *** was defined as a line measured between the edge of the optic or its simulated image to the *** were divided into 3 groups:convex,concave,and plane according to preoperatory iris *** analysis was performed using the R program,for the comparison of independent groups and multiple comparisons,the Kruskal-Wallis test and the Dunn test were used ***:Mean difference between nasal preoperative SSD and postoperative RSD was-0.36±0.38,-0.29±0.48,and-0.18±0.30 mm in the concave,convex,and plane group,*** difference between temporal SSD and RSD was-0.36±0.37,-0.14±0.38,and-0.24±0.33 mm in the concave,convex,and plane group,*** were statistically significant differences between SSD and RSS for both nasal and temporal sides in the concave and plane group(P<0.002).CONCLUSION:Preoperative SSD and postoperative RSD for iris-claw p IOL shows significant differences in patients with concave and plane iris.

关键词： simulated safe distance refractive surgery refractive phakic intraocular lens anterior segment oct

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anterior segment Optical Coherence Tomography Indices and Their Value in Diagnosing Corneal Ectasia

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Open Journal of Ophthalmology 2021年第4期11卷 313-324页

作者： Angel Atanassov Marieta Konareva-Kostianeva Marin Atanassov Department of Ophthalmology Faculty of Medicine Medical University Plovdiv Bulgaria

Purpose: To determine the diagnostic value of the anterior segment optical coherence tomography (AS-oct) indices in differentiating normal from ectatic corneas. Material and Methods: Two groups of patients—with corneal ectasia and normal controls were compared. Each group consists of 80 eyes of 43 age and sex-matched patients. All of them underwent corneal topography with OCULUS Keratograph 5M and corneal pachymetry with AS-oct with RTVue-100. The indices generated by the AS-oct pachymetric scans were analyzed. Results: There was a statistically significant difference for all the examined indices between the two groups with p values segment. Conclusion: The anterior segment oct indices showed excellent capability in differentiating ectatic from normal corneas.

关键词： Keratoconus Corneal Ectasia Marginal Pellucid Degeneration anterior segment oct Pachymetry

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