Refractive error
Conditions
Interventions
Observation Group Visumax 500:None
Observation Group Visumax 800:None
Sponsors
Guangzhou Aier Eye Hospital
Eligibility
Sex/Gender
All
Age
18 Years to 40 Years
Inclusion criteria
Inclusion criteria: 1.The patient has reasonable expectations for the procedure; 2.Age: 18-40 years; 3.Myopia: -1 D to -10 D, astigmatism: -5 D; 4.Refractive error: within 0.5 D within two years.
Exclusion criteria
Exclusion criteria: 1.The patient's head cannot be positioned normally; 2.severe amblyopia; 3.keratoconus or suspected keratoconus or other ectatic diseases or corneal degeneration; 4.active inflammation of the eyelids and ocular surface, recent recurrent viral keratitis; 5.significant corneal scarring; 6.severe dry eye, Sjögren's syndrome; 7.thin cornea, with the remaining corneal stromal bed thickness less than 280µm after surgery; 8.severe ocular adnexal disease, eyelid coloboma or deformity, severe incomplete eyelid closure; 9.uncontrolled glaucoma; 10.severe cataracts that affect vision; 11.systemic connective tissue disease or autoimmune disease; 12.severe psychological or psychiatric problems such as anxiety and depression; 13.systemic or psychiatric illnesses, such as epilepsy or hysteria, that prevent the patient from cooperating with examination and surgery.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Uncorrected distance visual acuity; | — |
Secondary
| Measure | Time frame |
|---|---|
| Corneal topography & tomography;Manifest refraction;Visual quality Questionaire;Complication;Contrast sensitivity; | — |
Countries
China
Contacts
Public ContactXiong Lu
Guangzhou Aier Eye Hospital
Outcome results
None listed