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Comparison of visual quality after SMILE correction of low to moderate myopia in different optical zones

Comparison of visual quality after SMILE correction of low to moderate myopia in different optical zones

Status
Recruiting
Phases
Unknown
Study type
Interventional
Source
ChiCTR
Registry ID
ChiCTR2100044212
Enrollment
Unknown
Registered
2021-03-12
Start date
2021-03-01
Completion date
Unknown
Last updated
2021-08-30

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Myopia surgery

Interventions

6.5mm group vs 6.8mm group:femtosecond laser small incision corneal stromal lens extraction (SMILE) in different optical zones

Sponsors

Department of Ophthalmology, The Second Affiliated Hospital of Harbin Medical University
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to 39 Years

Inclusion criteria

Inclusion criteria: Aged >=18 years old, no history of eye disease or trauma, transparent cornea without pannus or pannus, soft contact lens stop wearing for more than 2 weeks or rigid contact lens stop wearing more than 4 weeks, diopter every year within 2 years The degree of increase is less than 0.5D.

Exclusion criteria

Exclusion criteria: The corneal thickness cannot meet the surgical requirements, keratoconus or suspicious keratoconus, and other serious diseases of the eye and the whole body.

Design outcomes

Primary

MeasureTime frame
uncorrected visual acuity;best corrected visual acuity;spherical equivalent;—

Secondary

MeasureTime frame
Corneal various high-order aberrations;Subjective visual quality questionnaire score;—

Countries

China

Contacts

Public ContactLili Dai

Second Affiliated Hospital of Harbin Medical University

dailili_1979@126.com+86 15134564367

Outcome results

None listed

Source: ChiCTR (via WHO ICTRP) · Data processed: Feb 4, 2026