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Article: Effect of the Learning Curve on Visual and Refractive Outcomes of Small-Incision Lenticule Extraction

TitleEffect of the Learning Curve on Visual and Refractive Outcomes of Small-Incision Lenticule Extraction
Authors
Keywordsastigmatism
Key Words: SMILE
learning
outcomes
Issue Date2017
PublisherLippincott Williams & Wilkins. The Journal's web site is located at http://www.corneajrnl.com/
Citation
Cornea, 2017, v. 36 n. 9, p. 1044-1050 How to Cite?
AbstractPurpose: To investigate the effect of the learning curve for small-incision lenticule extraction during the first 2 years of experience. Methods: Small-incision lenticule extraction was performed using the 500-kHz VisuMax femtosecond laser (Carl Zeiss Meditec) by the same surgeon. The initial 100 patients since the surgeon started operating independently were considered as group 1; the recent 100 patients were considered as group 2. The same laser settings and technique were used. The visual and refractive outcomes were compared between groups at postoperative 1 week and 6 months. Vector analysis was performed for eyes with astigmatic correction. Results: Two hundred right eyes of 200 patients were included. Age, preoperative corrected visual acuity, manifest refraction, and central corneal thickness were similar between groups (P ≤ 0.154). Postoperatively, the efficacy index at 1 week was better in group 2 (group 1: 0.85 ± 0.16 vs. group 2: 0.91 ± 0.10, P = 0.019) but was similar between groups at 6 months (group 1: 0.91 ± 0.14 vs. group 2: 0.94 ± 0.08, P = 0.181). The safety index was higher in group 2 at 1 week (group 1: 0.93 ± 0.10 vs. group 2: 0.95 ± 0.08, P = 0.045) and 6 months postoperatively (group 1: 0.97 ± 0.07 vs. group 2: 0.99 ± 0.03, P = 0.011). Vector analysis showed that postoperative residual astigmatism and misalignment of astigmatic correction were lower in group 2 than in group 1 (P ≤ 0.039) at 1 week and 6 months. The duration of docking and that of lenticule extraction was shorter in group 2 (P ≤ 0.034). Conclusions: Our study showed that faster visual recovery, better safety profile, and more accurate astigmatic correction could be attained with increasing surgical experience. © 2017 Wolters Kluwer Health, Inc.
Persistent Identifierhttp://hdl.handle.net/10722/242121
ISSN
2023 Impact Factor: 1.9
2023 SCImago Journal Rankings: 1.019
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorChan, TCY-
dc.contributor.authorNg, LKA-
dc.contributor.authorCheng, GPM-
dc.contributor.authorWoo, CPV-
dc.contributor.authorZhang, J-
dc.contributor.authorWang, Y-
dc.contributor.authorJhanji, V-
dc.date.accessioned2017-07-24T01:35:38Z-
dc.date.available2017-07-24T01:35:38Z-
dc.date.issued2017-
dc.identifier.citationCornea, 2017, v. 36 n. 9, p. 1044-1050-
dc.identifier.issn0277-3740-
dc.identifier.urihttp://hdl.handle.net/10722/242121-
dc.description.abstractPurpose: To investigate the effect of the learning curve for small-incision lenticule extraction during the first 2 years of experience. Methods: Small-incision lenticule extraction was performed using the 500-kHz VisuMax femtosecond laser (Carl Zeiss Meditec) by the same surgeon. The initial 100 patients since the surgeon started operating independently were considered as group 1; the recent 100 patients were considered as group 2. The same laser settings and technique were used. The visual and refractive outcomes were compared between groups at postoperative 1 week and 6 months. Vector analysis was performed for eyes with astigmatic correction. Results: Two hundred right eyes of 200 patients were included. Age, preoperative corrected visual acuity, manifest refraction, and central corneal thickness were similar between groups (P ≤ 0.154). Postoperatively, the efficacy index at 1 week was better in group 2 (group 1: 0.85 ± 0.16 vs. group 2: 0.91 ± 0.10, P = 0.019) but was similar between groups at 6 months (group 1: 0.91 ± 0.14 vs. group 2: 0.94 ± 0.08, P = 0.181). The safety index was higher in group 2 at 1 week (group 1: 0.93 ± 0.10 vs. group 2: 0.95 ± 0.08, P = 0.045) and 6 months postoperatively (group 1: 0.97 ± 0.07 vs. group 2: 0.99 ± 0.03, P = 0.011). Vector analysis showed that postoperative residual astigmatism and misalignment of astigmatic correction were lower in group 2 than in group 1 (P ≤ 0.039) at 1 week and 6 months. The duration of docking and that of lenticule extraction was shorter in group 2 (P ≤ 0.034). Conclusions: Our study showed that faster visual recovery, better safety profile, and more accurate astigmatic correction could be attained with increasing surgical experience. © 2017 Wolters Kluwer Health, Inc.-
dc.languageeng-
dc.publisherLippincott Williams & Wilkins. The Journal's web site is located at http://www.corneajrnl.com/-
dc.relation.ispartofCornea-
dc.rightsThis is a non-final version of an article published in final form in (provide complete journal citation)-
dc.subjectastigmatism-
dc.subjectKey Words: SMILE-
dc.subjectlearning-
dc.subjectoutcomes-
dc.titleEffect of the Learning Curve on Visual and Refractive Outcomes of Small-Incision Lenticule Extraction-
dc.typeArticle-
dc.identifier.emailNg, LKA: nlk008@hku.hk-
dc.identifier.authorityNg, LKA=rp01842-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1097/ICO.0000000000001246-
dc.identifier.pmid28644239-
dc.identifier.scopuseid_2-s2.0-85021104952-
dc.identifier.hkuros273171-
dc.identifier.volume36-
dc.identifier.issue9-
dc.identifier.spage1044-
dc.identifier.epage1050-
dc.identifier.isiWOS:000407380100007-
dc.publisher.placeUnited States-
dc.identifier.issnl0277-3740-

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