Association Between ORA and Residual Refractive Astigmatism After SMILE

Taipei Nobel Eye Clinic530 enrolled

Overview

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.

Study Type

OBSERVATIONAL

Enrollment

530

Conditions

Refractive Errors Astigmatism

Interventions

Small Incision Lenticule ExtractionPROCEDURE

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

Eligibility

Sex: ALLMin age: 20 YearsMax age: 50 Years

Medical Language ↔ Plain English

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

Locations (1)

Taipei Nobel Eye Clinic

Taipei, Taiwan

Outcomes

Primary Outcomes

Corrected distance visual acuity

in LogMAR unit

Time frame: 3 months after surgery

Manifest refraction

in Diopter

Time frame: 3 months after surgery

Data from ClinicalTrials.gov

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