Myopia
Conditions
Interventions
Experimental Group 1:Fit bifocal composite defocus lenses
Experimental Group 2:Fit bifocal composite defocus lenses
Sponsors
Bejing Tongren Hospital, Capital Medical Uniersity
Eligibility
Sex/Gender
All
Age
6 Years to 14 Years
Inclusion criteria
Inclusion criteria: 1.Age 6~14 years old, gender is not limited; 2.The refractive status met the following conditions: a) After ciliary muscle paralysis, the equivalent spherical photometry of both eyes was between -0.50D and -6.00D (including -0.50D and -6.00D); b) After ciliary muscle paralysis, astigmatism in both eyes was =10mmHg, <=21mmHg); 4.The best corrected far vision at any one glance is better than or equal to 1.0; 5.There was no amblyopia or any other ocular pathological changes in both eyes; 6.Parents/guardians understand the scheme and are willing to accept random grouping; 7.The patient clearly understands and voluntarily participates in the study, and the informed consent is signed by the patient and the parent/guardian;
Exclusion criteria
Exclusion criteria: 1.Those who are allergic to the mydriatic agents used in this research (such as atropine, cyclopentolate, procaine, or benzalkonium chloride) or their components; 2.Either eye may have an abnormality of the refractive system, such as keratoconus, conical lens, spherical lens, etc. 3.Diseases that may affect the development of refractive errors or are prone to progressing to high myopia, such as: Down syndrome, Marfan syndrome, retinopathy of prematurity, neonatal hypoxic-ischemic encephalopathy patients, etc. 4.Either eye may have other ocular abnormalities or diseases that affect vision, such as ptosis of the upper eyelid, congenital abnormalities of the cornea, corneal leukoma, congenital lens abnormalities, cataract, macular degeneration, choroidal lesion, severe vitreous opacity, retinal lesion, etc. 5.Either eye has a history of glaucoma and/or has a shallow anterior chamber. 6.Previous or current conditions include obvious strabismus, amblyopia or nystagmus. 7.Those who have used drugs that may affect the evaluation of therapeutic effect within the past 3 months, either systemically or locally, are excluded. Such drugs include anticholinergic drugs such as atropine and pilocarpine; muscarinic drugs such as physostigmine; or drugs that may affect pupil size and accommodation, such as atropine tablets, morphine or sedative-hypnotic drugs. 8.Within one month, the following treatments for myopia control were used: atropine or other antimuscarinic drugs, bifocal/progressive or multifocal contact lenses, bifocal/progressive or multifocal frame glasses, orthokeratology lenses, rigid gas-permeable or other types of corneal contact lenses used to delay the progression of myopia. 9.History or current presence of systemic diseases: immune system disorders, central nervous system disorders, asthma, diabetes, severe cardiac or pulmonary dysfunction, severe liver or kidney dysfunction. 10.Unable to voluntarily participate in this study or having low enthusiasm; 11.Unable to cooperate with regular follow-ups and various examinations; 12.The researchers believe that there are any other circumstances that would disqualify one from participating in this trial.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Fundus photography;Axial length of the eye;Intraocular pressure;Diopter number; | — |
Secondary
| Measure | Time frame |
|---|---|
| Visual function examination; | — |
Countries
China
Contacts
Public ContactLei Tian
Bejing Tongren Hospital, Capital Medical Uniersity
Outcome results
None listed