Stepless out-of-focus lens and frame glasses
The utility model provides a stepless out-of-focus lens for controlling myopia development by utilizing a myopia peripheral out-of-focus technology, which ensures excellent central visual quality while realizing the control of the myopia development. The stepless out-of-focus lens comprises an optic...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The utility model provides a stepless out-of-focus lens for controlling myopia development by utilizing a myopia peripheral out-of-focus technology, which ensures excellent central visual quality while realizing the control of the myopia development. The stepless out-of-focus lens comprises an optical area, the optical area is provided with a front surface and a rear surface, at least one of the front surface and the rear surface is designed to be an aspheric surface, the aspheric surface is formed in the mode that the radial diopter changes continuously, and the distribution of the radial diopter has the characteristics that the center is flat and the periphery is steep. The central flat part of the radial refractive power distribution forms a central flat area, the peripheral steep part of the radial refractive power distribution forms a peripheral steep area, and the change of the diopter of the central flat area is smaller than the change of the diopter of the peripheral steep area.
本实用新型提供一种利用近视化周边离焦技术控制 |
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