Optimally designed aspheric myopia lens and preparation mold thereof

Abstract

The invention discloses an optimally designed aspheric myopia lens and a preparation mold thereof. A spectacle lens body is divided into four areas, namely a central luminosity stable area with stable diopter change, an off-axis aberration correction area which adopts focal power compensation and controls an astigmatism value and an average diopter value, an astigmatism control area which reduces the astigmatism value as much as possible, and a processing control area which effectively controls stable change of rise and reduces edge thickness. The imaging quality of the aspheric myopia lens provided by the invention is superior to that of a myopia lens with the same luminosity in the prior art, and the aspheric myopia lens can improve the wearing comfort and reduce the influence that the actual wearing effect deviates from the theoretical design caused by the inclination angle of a spectacle frame, the wearing position of the frame spectacles and the bad habits of a wearer according to the use characteristics of the frame spectacles; meanwhile, the spectacle lens can be manufactured in batches through a mold, is convenient to process, reduces the cost, and is beneficial to further popularization and application of the aspherical lens.

Description

technical field [0001] The invention relates to a myopia lens, in particular to an optimized aspheric myopia lens which improves the wearer's comfort and a preparation mold thereof. Background technique [0002] The design of ordinary aspheric lenses often only considers the theoretical far-point spherical model of parallel light incidence. This design is only available when the point pupil assembly is correct, the wearer has good wearing habits, and the frame is parallel to the retina. In order to achieve the theoretical design effect. But in fact, in practical applications, it is difficult for many wearers to achieve these three points. The inclination angle of the frame will affect the theoretical wearing effect, and the bad habits of some wearers include the frame slipping up and down the bridge of the nose and there are frequent occurrences. Although dotted pupils are an assembly requirement for aspherical lenses, not all optical shops It will be implemented and the a...

AI Technical Summary

Problems solved by technology

But in fact, in practical applications, it is difficult for many wearers to achieve these three points

The inclination angle of the frame will affect the theoretical wearing effect, and the bad habits of some wearers include the frame slipping up and down the bridge of the nose and there are frequent occurrences. Although the dotted pupil is an assembly requirement for aspheric lenses, not all optical shops will be carried out and the assembly itself is difficult to guarantee complete accuracy

Once the lens wearing position deviates, the actual perception effect of the aspheric lens may not be as good as that of the spherical lens without aberration correction.

The personalized aspheric lens with compensatory optimization design and precise assembly in the manufacturing factory for different wearing positions of individual glasses solves the problems caused by the influence of wearing position, but this kind of personalized lens cannot be mass-manufactured by mold casting , the cost of turning and ordering is very high, and the fitting method is relatively complicated and difficult to promote

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