Ophthalmic Diseases
Conditions
Interventions
Group A:Single focus frame glasses
Group B:Single focus soft contact lens
Group C:Multifocal soft contact lens
Sponsors
American Learning and Vision Association
Eligibility
Sex/Gender
All
Age
7 Years to 12 Years
Inclusion criteria
Inclusion criteria: (1) Age: 7-12 years old; (2) Willing to participate in this study with full informed consent; (3) Binocular/monocular, eye axis less than 24.0 mm; (4) Through dilated pupil optometry, the equivalent degree of ball-mirror is greater than +1.50D; (5) The best corrected visual acuity in both eyes >= 0.8; (6) The corrected visual acuity of wearing multi-focal soft contact lens and SCL and frame glasses shall not exceed one line; (7) Wear corneal contact lens with appropriate coordination, good center positioning, mobility of 0.5-1.0mm, hysteresis of 0.5-1.5mm.
Exclusion criteria
Exclusion criteria: (1) Previous history of other ocular diseases (such as abnormal ocular position, fundus abnormalities, trauma, severe dry eye, glaucoma, posterior sclera staphyloma, nystagmus, etc.); (2) Previous history of ocular surgery; (3) Wear history of RGP within 4 weeks; Wear history of soft contact lens within 2 weeks; (4) Patients with small palpebral fissure and small corneal diameter; (5) The corneal contact lens did not meet the successful matching standard. (6) The pupil diameter of the subject is less than 2mm; Corneal transverse diameter greater than 12.5mm, or less than 11.0mm.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| refractive diopter;corneal curvature;axial length;monocular adjustment range;eye position;silt-lamp examination;break-up time of tear film; | — |
Countries
China
Contacts
Public ContactGao Xu
Bishan People's Hospital
Outcome results
None listed