Refractive Errors, Astigmatism
Conditions
Brief summary
The aim of our study is to analysis and compare the relationship between ORA and postoperative astigmatism in low astigmatism (less than 1D) and moderate to high (1D to 3D) astigmatism patients after SMILE (Small Incision Lenticule Extraction) refractive surgery.
Interventions
PROCEDURESmall Incision Lenticule Extraction
A 500 kHzVisumax (Carl Zeiss Meditec AG) femtosecond laser was used with cap thickness ranging from 100 to 130μm, cap diameter from 7.3 to 7.9 mm. The lenticule was dissected with a blunt spatula through a 30 to 60-degree incision at the 10 o'clock position and removed using forceps afterward. Treatment targets of both eyes were set to emmetropia, the refraction corrections were based on manifest refractions
Sponsors
Taipei Nobel Eye Clinic
Study design
Observational model
COHORT
Time perspective
RETROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
20 Years to 50 Years
Healthy volunteers
No
Inclusion criteria
* Corrected distance visual acuity of both eyes reaches 0.1 logarithm of the minimum angle of resolution (logMAR) * Stable refractive errors of myopia and astigmatism who received SMILE refractive surgery of both eyes
Exclusion criteria
* Cataract * Corneal opacities or irregularities * Dry eye (Schirmer's test I ≤ 5mm) * Amblyopia * Coexisting ocular pathologies * Glaucoma * Non-dilating pupil * History of intraocular surgery, laser therapy, or retinopathy * Optic nerve or macular diseases * Estimated postoperative cornea residual stromal thickness less than 250 μm * Pregnancy or under lactation * Uncontrolled diabetic mellitus or systemic immune disease \_Refusal or unable to maintain follow-up
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Corrected distance visual acuity | 3 months after surgery | in LogMAR unit |
| Manifest refraction | 3 months after surgery | in Diopter |
Countries
Taiwan
Outcome results
None listed