Comparison of Visual Outcomes and Higher Order Corneal Aberrations between SMILE and Femtosecond LASIK for Myopia Astigmatism Correction in VIETNAM

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Published: Dec 30, 2024
DOI: https://doi.org/10.36281/2024020203
Keywords:
visual outcome higher order corneal aberration refractive surgery SMILE FS-LASIK

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Tran Thi Kim Ngan
Department of Optometry, Pham Ngoc Thach University of Medicine
Tan Xuan Li
Faculty of Optometry & Vision Sciences, the First Affiliation, SEGi University
Azrin Esmady Ariffin
Faculty of Optometry & Vision Sciences, the First Affiliation, SEGi University
Trinh Quang Tri
Department of Optometry, Pham Ngoc Thach University of Medicine
Vo Thi Thu Thao
Hoan My (Prima) International Eye Hospital
Vo Thi Bao Chau
Department of Optometry, Pham Ngoc Thach University of Medicine
Nguyen Duc Trong
Phuong Dong International Eye Clinic
Pham Phuong Nga
National Eye Hospital
Nguyen Huyen Trang
Hanoi Medical University

Abstract

Introduction: To compare the visual outcomes and HOAs of small incision lenticule extraction (SMILE) and Femtosecond LASIK (FS-LASIK) for myopia correction in Southern Vietnamese.
Methods: A total of 40 patients underwent bilateral refractive procedures (40 eyes for SMILE and 40 eyes for FS-LASIK) at a tertiary international hospital in Ho Chi Minh City, Vietnam. Data were collected at three consecutive visits: pre-operative, 1 month and 6      months post-operatively. The data collected included visual outcomes (visual acuity and refraction) and higher order corneal aberrations (vertical coma, horizontal coma, spherical aberration, and total higher order corneal aberration).
Results: Data normality was tested with the Shapiro–Wilk test. The difference in visual outcomes and HOAs were compared between the two procedures with the Mann–Whitney U test. Intragroup differences at the three consecutive visits were compared using the Friedman test.  A p<0.05 was considered significant. All participants achieved a corrected distance visual acuity of 20/20. The percentage of eyes achieving uncorrected visual acuity ≥ 20/20 was higher in the SMILE (95%) than in the FS-LASIK (85%, p>0.05) group at 6-months. Spherical aberration at 6 months postoperatively      was significantly higher in the FS-LASIK (0.44±0.14 µm) than in the SMILE (0.34±0.14 µm) group, p=<0.01. Only two eyes (5%) in the SMILE and one eye (2.5%) in the FS-LASIK group lost one line in CDVA (p>0.05).
Conclusions: SMILE and FS-LASIK are safe and effective surgical options for myopia correction. SMILE achieves slightly greater accuracy in terms of achieving the intended refractive outcomes compared to FS-LASIK. Additionally, SMILE induces less spherical aberration compared to FS-LASIK.

Article Details

Issue
Vol. 19 No. 2 (2024): July-December 2024
Section
Original Study
Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Author Biographies

Tran Thi Kim Ngan, Department of Optometry, Pham Ngoc Thach University of Medicine

Tran Thi Kim Ngan, is the 1st author, she is currently study Master of Vision Science at SEGi University, Kota Damansara, Malaysia.  She is also a lecturer at Pham Ngoc Thach University of Medicine in Ho Chi Minh city, Vietnam. 

Tan Xuan Li, Faculty of Optometry & Vision Sciences, the First Affiliation, SEGi University

Second author,

Dr. Tan Xuan Li is currently a lecturer and optometrist at SEGi University, Kota Damansara, Malaysia

Azrin Esmady Ariffin, Faculty of Optometry & Vision Sciences, the First Affiliation, SEGi University

Co-author,

Prof. Azrin Esmady Ariffin is a Vice Chancellor at SEGi University, Kota Damansara, Malaysia

Trinh Quang Tri, Department of Optometry, Pham Ngoc Thach University of Medicine

Co-author, 

Dr. Trinh Quang Tri is currently a Head of Optometry Department at Pham Ngoc Thach University of Medicine in Ho Chi Minh city, Vietnam. He is a M.D, ophthalmologist. 

Vo Thi Thu Thao, Hoan My (Prima) International Eye Hospital

Co-author,

Dr.Vo Thi Thu Thao is currently a CEO of Prima Sai Gon Eye International Hospital in Ho Chi Minh city, Vietnam. She is an ophthalmologist, specialize in refractive surgery. 

Vo Thi Bao Chau, Department of Optometry, Pham Ngoc Thach University of Medicine

Co-author, 

Dr. Vo Thi Bao Chau is an ophthalmologist, currently working at Optometry Department at Pham Ngoc Thach University of Medicine in Ho Chi Minh city, Vietnam. 

Nguyen Duc Trong, Phuong Dong International Eye Clinic

Co-author,

Dr. Nguyen Duc Trong is an ophthalmologist, specialize in refractive surgery, currently working at Phuong Dong International Eye Center. 

Pham Phuong Nga, National Eye Hospital

Co-author,

Pham Phuong Nga is an optometrist, currently working at Vietnam National Eye Hospital in Ha Noi, Vietnam. 

Nguyen Huyen Trang , Hanoi Medical University

Co-author,

Nguyen Huyen Trang is an optometrist,  a lecturer at Ha Noi Medical University. She is currently achieving the full scholarship from Vietnam government to study PhD in the UK.

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