Vector analysis of astigmatic correction after single-step transepithelial photorefractive keratectomy and femtosecond-assisted laser in-situ keratomileusis for low to moderate myopic astigmatism

Vector analysis of astigmatic correction after single-step transepithelial photorefractive keratectomy and femtosecond-assisted laser in-situ keratomileusis for low to moderate myopic astigmatism

Purpose: This study aimed to evaluate the outcomes of astigmatic correction by single-step transepithelial photorefractive keratectomy (TransPRK) and femtosecond-assisted laser in-situ keratomileusis (Femto-LASIK) surgeries. Methods: A total of 218 subjects received TransPRK or Femto-LASIK surgery f...

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Bibliographic Details
Main Authors: Lixia Sun, Vishal Jhanji, Senmao Li, Jinyu Li, Ruifeng Ji, Hongqiang Zeng, Tsz Kin Ng, Mingzhi Zhang, Riping Zhang
Format: Article
Language:English
Published: Wolters Kluwer Medknow Publications 2022-01-01
Series:Indian Journal of Ophthalmology
Subjects:
astigmatism
keratorefractive surgery
low to moderate myopia
vector analysis
Online Access:http://www.ijo.in/article.asp?issn=0301-4738;year=2022;volume=70;issue=10;spage=3483;epage=3489;aulast=Sun
Description
Summary:Purpose: This study aimed to evaluate the outcomes of astigmatic correction by single-step transepithelial photorefractive keratectomy (TransPRK) and femtosecond-assisted laser in-situ keratomileusis (Femto-LASIK) surgeries. Methods: A total of 218 subjects received TransPRK or Femto-LASIK surgery for the treatment of myopia and astigmatism (−2.25 to −0.25 D). Refraction errors and uncorrected (UDVA) and corrected distance visual acuity (CDVA) were examined before and at 3 months after surgery. Astigmatism changes were assessed by vector analysis. Results: Preoperative parameters of the TransPRK group were similar to the Femto-LASIK group. UDVA and CDVA at 3 months were similar between both groups. Manifest refraction (MR) spherical equivalent in the TransPRK group (0 ± 0.20 D) was slightly lower compared with the Femto-LASIK group at 3 months (0.11 ± 0.25 D, P = 0.001). MR cylinder was -0.06 ± 0.19 D in the TransPRK group and -0.02 ± 0.15 D in the Femto-LASIK group at 3 months (P = 0.135). The index of success (IS) was 0.15 ± 0.36 in the TransPRK group and 0.06 ± 0.17 in the Femto-LASIK group (P = 0.125). The correction index (CI) was 1.03 ± 0.19 in the TransPRK group and 1.01 ± 0.11 in the Femto-LASIK group (P = 0.815). Conclusion: For low to moderate myopic astigmatism, TransPRK provided a comparable astigmatic treatment effect as Femto-LASIK. Myopic astigmatism was both slightly overcorrected after TransPRK and Femto-LASIK surgeries.
ISSN:0301-4738
1998-3689

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