Lens related diseases
Conditions
Interventions
experimental group:Femtosecond laser assisted phacoemulsification combined with trifocal intraocular lens implantation
control group:Femtosecond laser assisted phacoemulsification combined with implantation of Symphony
Sponsors
Army Medical Center of PLA
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: (1) The age is more than 50 years old and the gender is not limited; (2) Presbyopia and strong "off lens" demand, hope to reduce the dependence of postoperative reading on glasses, the patients who have high requirements for distant, medium and near vision, give priority to the hyperopia group, followed by the presbyopia patients with emmetropia and high myopia, relatively young, good fundus conditions, and no other eye diseases that affect vision; (3) The cornea was transparent, the size of blepharoplasty was normal, and the operation of femtosecond laser was not affected; (4) Optimistic personality, rational cognition of postoperative effect, able to balance and accept the advantages and disadvantages of glare, halo and night discomfort caused by lens removal and multifocal intraocular lens; (5) It is generally required that the expected postoperative astigmatism should be less than or equal to 1.00 D. for patients with both expected postoperative astigmatism and full visual acuity, the residual astigmatism can be corrected by femtosecond AK surgery or corneal refractive surgery; (6) It is suggested that the natural diameter of the pupil in the dark room should be 3.0 - 5.5 mm; (7) Kappa angle < 0.3 mm.
Exclusion criteria
Exclusion criteria: (1) The abnormal anatomical structure of the orbit, eyelid or eyeball makes the femtosecond laser unable to operate normally, such as the narrow eyelid fissure and eyelid deformation; (2) Patients can not actively cooperate with surgery, such as nystagmus, intraoperative fixation, head position or supine position due to systemic diseases; (3) Patients with progressive retinal diseases, such as diabetic retinopathy, macular degeneration, epiretinal membrane, vitreomacular traction syndrome, Stargardt's disease, retinitis pigmentosa, and severe optic nerve diseases; (4) Ocular organic diseases such as microphthalmos, ultra-high myopia, chronic uveitis, uncontrolled glaucoma or thin-walled filtering blebs, obvious abnormalities of lens capsule and suspensory ligament, obvious heterotopia, large degree alternating strabismus, and amblyopia patients; (5) Corneal diseases that hinder corneal flattening, corneal opacity that interferes with laser beam, etc; (6) Severe corneal lesions or severe irregular astigmatism, low intraocular pressure or corneal implants exist; (7) The diameter of dilated pupil was less than 5mm, and the pupil was heterotopic; (8) Patients who often drive at night; (9) Patients with known severe mental and psychological diseases; (10) Patients with anxiety, paranoia and unrealistic expectations.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Defocusing curve;vision; | — |
Secondary
| Measure | Time frame |
|---|---|
| OQAS;Visual quality questionnaire; | — |
Countries
China
Contacts
Public ContactGao Ling
Army Medical Center of PLA
Outcome results
None listed