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Influence factors of lens thickness

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Many in the crowd with a myopic lens when equipped wants to look beautiful and relatively thin lenses. If the lens is not too thick and beautiful, but also affect the thickness of glasses there are multiple factors, different factors , lens choice for those concerned, is also helpful , here’s a look at the impact glasses thickness factors.

Center of the frame are generally IPD than the actual individual large, so is the need to shift the lens center , the center of the lens moves toward the nose side , thus loading glasses when they are needed to move the lens , the more the shift large, the thicker the outer lenses also .

Factors degrees

The impact of the lens thickness is a very important factor , since the glasses lens is a concave lens , Therefore, the optical film is relatively thin in the middle , and the periphery will be relatively thick. In general , then, then the higher the degree of myopia , the periphery of the spectacle lens is thicker . Therefore generally not suitable for people with high myopia wearing semi-rimless glasses with thick lenses affect the appearance of the surrounding have a great relationship .

Myopic refractive index of the lens

We choose the lens , many people will view the refractive index of the lens parameters , the same material in the same degree , the higher the refractive index of the lens , then the lens is , the more thin. Myopic refractive index of the lens to a large extent on the choice for the myopic lens groups to provide a reference. In general, a relatively high degree of fit lenses, choose a low degree of myopia selection of low refractive index of the high refractive index of the lens .

Type lenses

In general, color lenses , polarized lenses , tinted lenses , etc. Taking into account the stability of the lens performance , the lens has some special factors ingredients, therefore , than the same degree of common transparent lens to be thicker . For example, polarized lenses because polarizing layer is added , so the lens is thicker than ordinary lenses .

Curvature of the lens

The smaller the curvature of the outer lens , the more light the lens , and the size of the bend of the lens also affects the size of the field of view , the bend of the lens is smaller , then the smaller field of vision . Aspherical lens surface design because it is used in the ring , lens curvature and thickness to achieve the best balance of vision , the lens flat , thin, vision is also very open, so generally speaking , then , aspheric lenses are relatively thin .


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