Ametropia
Conditions
Interventions
experimental group:Adopting the improved one-step EVO-ICL implantation technique
Control Group One:Using the min-ophthalmic viscosurgical device technique
Control Group Two:Using one-step technique
Sponsors
Xi'an People's Hospital (Xi'an Fourth Hospital)
Eligibility
Sex/Gender
All
Age
18 Years to 45 Years
Inclusion criteria
Inclusion criteria: 1. Age: 18 - 45 years old; 2. For patients wearing contact lenses, it is recommended to stop wearing them before the surgery. Generally, soft lenses should be discontinued for 1 week, rigid gas-permeable contact lenses for 3 weeks, and orthokeratology lenses for 3 months; 3. No eye diseases, trauma or surgical history; 4. No family history, especially no history of corneal dystrophy or glaucoma; 5. No history of systemic diseases; 6. No history of medication, adverse drug reactions or allergies; 7. The patient has the desire to improve refractive status through posterior chamber intraocular lens implantation of the crystalline lens and has reasonable expectations for the surgical outcome; 8. For patients with myopia or combined astigmatism, it is generally required that the refractive power remain relatively stable, that is, the annual change in refractive power should be = 2000 cells/mm2, with stable cell morphology; 10. Anterior chamber depth >= 2.80 mm and the angle is open; 11. There are no other obvious eye diseases and/or systemic organic lesions that affect vision and/or the recovery after surgery.
Exclusion criteria
Exclusion criteria: The presence of any one of the following conditions: 1. Unstable keratoconus or other keratectatic changes; 2. Corneal endothelial dystrophy; 3. Active eye disease or infection; 4. Severe ocular adnexal diseases, such as eyelid defect, deformity and severe eyelid dysraphism; 5. Previous glaucoma, cataract, uveitis and other eye diseases that significantly affect vision; 6. Severe anxiety, depression and other psychological and mental diseases; 7. Diseases that cannot cooperate with examination and surgery, such as epilepsy, hysteria, etc. 8. Severe hyperthyroidism with exophthalmos and the condition is not stable.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Time of operation;Uncorrected visual acuity, the best corrected visual acuity, and the intraocular pressure;Inflammatory response, anterior chamber cells;Corneal endothelial parameters;Anterior chamber depth, vault height;Visual Quality Questionnaire Survey; | — |
Secondary
| Measure | Time frame |
|---|---|
| Gender, age, spherical and cylindrical lens power; | — |
Countries
China
Contacts
Public ContactLin Guo
Xi'an People's Hospital (Xi'an Fourth Hospital)
Outcome results
None listed