This study is for testing the efficacy and safety of distance-image screens for preventing myopia in children for 12 month. Each subjects would be asked to paired test the ocular parameters between before and after 12-month distance-image screens.
This study is for testing the efficacy and safety of distance-image screens intended usage for preventing myopia in children with reading after a 6-meter-distant-image device. It was a prospective study. The investigators would like to recruit 100 volunteers, aged 6 years 16 in Beijing. All the volunteers will be complete examined their ocular parameters before using the distant-image screen in a random order for at least 2 hours daily for 12 month. The changes of ocular axial length and refractive error were both calculated before and after 12-month usage for paired t-test.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
PREVENTION
Masking
NONE
Enrollment
100
Distance-image screen is a screen make each image at distance of 6-meters to reduce the accommodation and convergence for eyes during the reading and learning with screens.
Airdoc MPC Opthalmology Clinics
Beijing, Beijing Municipality, China
RECRUITINGChanges of ocular axial length (mm)
IntraOcularLens (IOL) master biometry will exam each eye before the testing and after the testing with distance-image screen
Time frame: 12-month
Changes of refractive error (D)
Cycloplegic refraction with autorefractor will test each eye before the testing and after the testing with distance-image screen
Time frame: 12-month
Changes of center macular thickness (um)
Optic Coherent Topograph (OCT) of macular fovea central thickness will be made to compare the thickness before and after using distance-image screen
Time frame: 12-month
Changes of subretina choroidal thickness (um)
Optic Coherent Topograph (OCT) with Enhanced Depth Imaging (EDI) scan of macular fovea central thickness will be done to compare the thickness before and after using distance-image screen
Time frame: at 12-month
Changes of other regions choroidal thickness (um)
Optic Coherent Topograph (OCT) with Enhanced Depth Imaging (EDI) scan of other regions choroidal thickness will be done to compare the thickness before and after using distance-image screen
Time frame: 12-month
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