Clinical Outcomes of Small Incision Lenticule Extraction in Myopia: Study of Vector Parameters and Corneal Aberrations
Korean Journal of Ophthalmology
;
: 76-84, 2020.
Article
in English
| WPRIM
| ID: wpr-782233
ABSTRACT
PURPOSE: To investigate clinical outcomes of small incision lenticule extraction (SMILE) including vector parameters and corneal aberrations in myopic patients.METHODS:
This retrospective, observational case series included 57 eyes (29 patients) that received treatment for myopia using SMILE. Visual acuity measurement, manifest refraction, slit-lamp examination, autokeratometry, corneal topography, and evaluation of corneal wavefront aberration were performed preoperatively and at 1 and 3 months after surgery. We analyzed the safety, efficacy, vector parameters, and corneal aberrations at 3 months after surgery.RESULTS:
Preoperatively, mean manifest refraction spherical equivalent refraction was −4.94 ± 1.94 D (range, −8.25 to 0 diopters [D]), and the cylinder was −1.14 ± 0.82 D (range, −3 to 0 D). Mean manifest refraction spherical equivalent improved to −0.10 ± 0.23 D at 3 months postoperatively, when uncorrected distance visual acuity was 20 / 20 or better in 55 (96%) eyes. The linear regression model of target induced astigmatism vector versus surgically induced astigmatism vector exhibited slopes and coefficients (R²) of 0.9618 and 0.9748, respectively (y = 0.9618x + 0.0006, R² = 0.9748). While total corneal root mean square higher order aberrations, coma and trefoil showed statistically significant increase, spherical aberration did not show statistically significant change after SMILE.CONCLUSIONS:
SMILE has proven to be effective and safe for correcting myopia and astigmatism. We showed that SMILE did not induce spherical aberrations. A small increase in postoperative corneal higher order aberration may be associated with increase in coma and trefoil.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Astigmatism
/
Visual Acuity
/
Linear Models
/
Retrospective Studies
/
Coma
/
Corneal Topography
/
Refractive Surgical Procedures
/
Corneal Wavefront Aberration
/
Lotus
/
Myopia
Type of study:
Observational study
Limits:
Humans
Language:
English
Journal:
Korean Journal of Ophthalmology
Year:
2020
Type:
Article
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