Myopia, Small-incision Lenticule Extraction (SMILE) Surgery
Conditions
Keywords
femtosecond laser, small-incision lenticule extraction (SMILE), unintended initial dissection of the posterior plane
Brief summary
To explore the potential factors for unintended initial dissection of the posterior plane in a large sample retrospective analysis and surgeons of different levels.
Detailed description
Myopia is the most common eye disease in the world. Femtosecond laser small incision lens extraction (SMILE) has increasingly become the first choice in refractive surgery due to its greater biomechanical stability, less impact on the tear film and other advantages. However, because SMILE surgery is more challenging than flap-based corneal ablative surgery, young surgeons sometimes dissect the lenticule posterior plane first in clinical practice, which will make it more difficult to extract the lenticule or even cause the retained lenticule. The purpose of this study aims to explore the potential risk factors for unintended initial dissection of the posterior plane in large samples and surgeons of different surgical volumes and different surgical habits (different angles of peripheral corneal incision) in multiple scenarios.
Interventions
PROCEDURESmall incision lenticule extraction
Small incision lenticule extraction surgeries performed by two Refractive surgery experts (Refractive surgery expert 1: YYF, Associate Professor with 10 years of experience as a refractive surgeon; Refractive surgery expert 2: GF, Associate Professor with 5 years of experience as a refractive surgeon) and a Attending ophthalmologist (WNY, Attending ophthalmologist with 1 year of experience as a refractive surgeon).
Sponsors
Yifeng Yu
Study design
Observational model
OTHER
Time perspective
OTHER
Eligibility
Sex/Gender
ALL
Age
18 Years to 45 Years
Healthy volunteers
Yes
Inclusion criteria
* A condition in which the spherical equivalent refractive error of an eye is ≤ -0.50 D when ocular accommodation is relaxed; * Age ≥18 years; * Spherical equivalent (SE) ≥ -10.0D; * Corrected distance visual acuity (CDVA) ≥ 16/20; * Stable myopia for at least 2 years; * No contact lenses wearing for at least 2 weeks.
Exclusion criteria
* The presence or history of eye conditions other than myopia and astigmatism, such as keratoconus or external eye injury; * A history of eye surgery; * The presence or history of systemic diseases.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| The number of patients with unintended initial dissection of the posterior plane in the SMILE surgeries | Day 0 | The number of patients with unintended initial dissection of the posterior plane were observed during the SMILE surgeries. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| The impact of spherical equivalent on the unintended initial dissection of the posterior plane (UIDPP) in SMILE surgeries | Day 0 | The spherical equivalent of eyes with UIDPP and eyes without UIDPP were analyzed, and statistical analysis was observed to investigate the impact of spherical equivalent on the UIDPP in SMILE surgeries. |
| The impact of peripheral corneal incision angle on the unintended initial dissection of the posterior plane (UIDPP) in SMILE surgeries | Day 0 | The peripheral corneal incision angle of eyes with UIDPP and eyes without UIDPP were analyzed, and statistical analysis was observed to investigate the impact of peripheral corneal incision angle on the UIDPP in SMILE surgeries. |
| The impact of peripheral lens thickness on the unintended initial dissection | Day 0 | The peripheral lens thickness of eyes with UIDPP and eyes without UIDPP were analyzed, and statistical analysis was observed to investigate the impact of peripheral corneal incision angle on the UIDPP in SMILE surgeries. |
| The impact of lens diameter on the unintended initial dissection | Day 0 | The lens diameter of eyes with UIDPP and eyes without UIDPP were analyzed, and statistical analysis was observed to investigate the impact of lens diameter on the UIDPP in SMILE surgeries. |
| The impact of central corneal thickness on the unintended initial dissection | Day 0 | The central corneal thickness of eyes with UIDPP and eyes without UIDPP were analyzed, and statistical analysis was observed to investigate the impact of central corneal thickness on the UIDPP in SMILE surgeries. |
Countries
China
Outcome results
None listed