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This study aims to evaluate the effectiveness of lenses with different defocused microlens array in controlling the progression of myopia in children and adolescents, and to explore the feasibility of effective defocus microlens design, and apply personalized defocus frame lenses for myopia prevention and control.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| H.M.E.C,High Precision Micro Encircle | Experimental |
| |
| H. A. L. T, highly aspheric lenslet technology | Active Comparator |
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Defocus microlenses | Device | Different microlenses array (H.M.E.C,High Precision Micro Encircle and H.A.L.T, highly aspheric lenslet technology) for controlling myopia progression in children and adolescents. |
| Measure | Description | Time Frame |
|---|---|---|
| Subjective refraction equivalent spherical | 2 years |
| Measure | Description | Time Frame |
|---|---|---|
| Axial length | 2 years |
| Measure | Description | Time Frame |
|---|---|---|
| Other biological parameters | amplitude of accommodation, anterior chamber depth, corneal curvature, white to white distance, central corneal thickness, lens thickness ,pupil size, multispectral refraction topography, choroidal thickness, objective visual quality, wavefront aberration, contrast sensitivity, and strabismus (mahalanobis bar method). | 2 years |
Inclusion Criteria:
Exclusion Criteria:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Shanghai Eye Diseases Prevention &Treatment Center/ Shanghai Eye Hospital, School of Medicine, Tongji University | Shanghai | Shanghai Municipality | 200050 | China |
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| Best corrected visual acuity | 2 years |
| questionnaires of daily eye habits and wearing time of subjects collected | 2 years |