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To compare the corneal spherical component (SC), regular astigmatism (RA), irregular astigmatism (IA, including Asymmetry and Irregularity) and visual quality six years after small incision lenticule extraction (SMILE) and laser subepithelial keratomileusis (LASEK) for mild to moderate myopia.
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| This study does not involve any interventions | Other | This study does not involve any interventions |
| Measure | Description | Time Frame |
|---|---|---|
| Corneal Irregular Astigmatism | The swept-source anterior segment OCT (CASIA SS-1000) was utilized to acquire corneal topography measurements. In the Corneal Map mode, 16 radial cross-sectional images (512 telecentric+A-scans) were obtained within a duration of 0.3 s for each measurement. The analysis program identified and digitized the anterior and posterior corneal surfaces to evaluate distributions of corneal power and corneal height for both the anterior and posterior corneal surfaces. The unit of Corneal Irregular Astigmatism is D. | preoperative and 6 years postoperatively |
| wavefront aberration | The wavefront aberrations were measured and analyzed for 6-mm pupil diameter with a Zywave aberrometer using a Hartmann-Shack sensor (Bausch & Lomb, US). The absolute Zernike coefficients including vertical trefoil, horizontal trefoil, vertical coma, horizontal coma, spherical aberration, and total higher-order aberrations (tHOAs) were examined. The unit of wavefront aberration is um. | preoperative and 6 years postoperatively |
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Inclusion Criteria:
Exclusion Criteria:
A history of moderate to severe dry eye as well as any ocular or systemic disease that would contraindicate laser refractive surgery
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patients with mild to moderate myopia or myopic astigmatism who underwent SMILE or LASEK between October 2017 and May 2018 were enrolled
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Shanghai 10th People's Hospital | Shanghai | China |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 41669707 | Derived | Li H, Hu W, Li M, Shi Y, Sun L, Ma X, Zou J. Evaluation of Corneal Irregular Astigmatism and Visual Quality Following Bilateral Sequential SMILE and LASEK: A Six-Year Comparative Study. J Ophthalmol. 2026 Feb 8;2026:5989651. doi: 10.1155/joph/5989651. eCollection 2026. |
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| ID | Term |
|---|---|
| D009216 | Myopia |
| ID | Term |
|---|---|
| D012030 | Refractive Errors |
| D005128 | Eye Diseases |
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