Myopia
Conditions
Interventions
Triple A group:One randomized eye use Triple A mode for corneal ablation
Topography group:The contralateral eye use Topography mode for corneal ablation.
Sponsors
Ningbo Eye Hospital
Eligibility
Sex/Gender
All
Age
18 Years to 45 Years
Inclusion criteria
Inclusion criteria: Inclusion criteria: 1, Patients between the ages of 18-45 years with refractive stability for more than 2 years; 2, Cessation of soft contact lens use for at least 1 week. 3, 20/25 or better corrected distance corrected visual acuity (BDVA); 4, Myopia (D) between 0 and -9.00 D in equivalent spherical lenses with or without myopic astigmatism (=4.00 D in cylindrical lenses); 5, Difference between equivalent spherical and column lenses between eyes = 1D; 6, Theoretical residual stromal bed thickness after cutting in Triple A and Topography modes =280 µm; 7, Minimum central corneal thickness (CCT) of 480 µm and normal corneal topography (pentacam).
Exclusion criteria
Exclusion criteria: Severe anisometropia; Have a history of ocular trauma or surgery (excluding strabismus surgery); Clinically significant corneal abnormalities, including scar formation, suspicious keratoconus, irregular astigmatism, and asymmetric bow tie astigmatism; Other active ocular diseases or systemic diseases.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Predicted CCT reduction;Acheived CCT reduction; | — |
Secondary
| Measure | Time frame |
|---|---|
| UCVA;BCVA;MRSE;Myopia Classification; | — |
Countries
China
Contacts
Public ContactQidi Hu;Xue Jiang
Ningbo Eye Hospital
Outcome results
None listed