Myopia
Conditions
Interventions
smile group:smile operation
smile xtra group:smile xtra operation
Sponsors
Zhongshan Hospital Affiliated to Fudan University
Eligibility
Sex/Gender
All
Age
18 Years to 50 Years
Inclusion criteria
Inclusion criteria: Inclusion criteria 1.The age range is from 18 to 50 years old; 2.The change in diopter within two years is =20/25; 4.The preoperative corneal stromal thickness was >=470 µ m. According to the Randleman dilation Risk Score, patients with a moderate to high dilation risk score (score >=3); 5.The estimated residual stromal bed thickness (RST) after lens removal is >=270um; 6.Soft contact lenses should be discontinued for at least one week, hard contact lenses for at least three weeks, and orthokeratology lenses for at least three months.
Exclusion criteria
Exclusion criteria: 1.Other eye diseases: keratoconus or suspected keratoconus, active keratoconjunctivitis, severe dry eye, glaucoma, etc; 2.Obvious scarring or lens opacity on the cornea affects observation; 3.There is active inflammation throughout the body, connective tissue disease or other systems that prevent cooperation with the surgery; 4.Sexual disorders or mental disorders; 5.There is a history of eye surgery in the past; 6.Those who are allergic to the components of surgical drugs.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Visual quality satisfaction score; | — |
Secondary
| Measure | Time frame |
|---|---|
| Corneal biomechanical parameter ;Visual quality scoring indicators;Aberration;UCVA, uncorrected distant visual acuity;BCVA, best corrected visual acuity;Corneal curvature;Equivalent spherical lens;Astigmatism;Corneal fog condition;intraocular pressure;The number of corneal endothelial cells;Anterior segment OCT corneal cross-linking line; | — |
Countries
China
Contacts
Public ContactJinhui Dai
Zhongshan Hospital Affiliated to Fudan University
Outcome results
None listed