Abstract: A front curve design method for preparing a resin lens with a high refractive index. The method includes within a myopia power range of ?1.00 to ?15.00, designing the maximum design front curve to be ?4.00 D from ?1.00 to ?3.50; designing the maximum design front curve to be ?3.00 D from ?3.75 to ?5.50; designing the maximum design front curve to be ?2.00 D from ?5.75 to ?8.75; and designing the maximum design front curve to be ?1.50 D from ?9.00 to ?15.00. The method of the present invention is mainly suitable for resin lenses with a refractive index of 1.60, 1.67 or 1.74.

Abstract: The present invention discloses a dyeable 1.74 resin lens and a preparation method thereof. The resin lens includes a module layer with a refractive index being 1.74, a dyeable layer with a refractive index being 1.60 is poured on an upper surface of the module layer, an upward curved degree of the dyeable layer is the same as an upward curved degree of the module layer, and a center thickness of the dyeable layer is 0.5-1.2 mm. According to the dyeable 1.74 resin lens of the present invention, a layer of dyeable 1.60plus resin lens is attached to a surface of a 1.74 lens, dyeing performance is good, a visible light transmittance can reach 10-30%, and the blank that the 1.74 lens cannot be dyed is filled.

Abstract: A front curve design method for preparing a resin lens with a high refractive index. The method includes within a myopia power range of ?1.00 to ?15.00, designing the maximum design front curve to be ?4.00 D from ?1.00 to ?3.50; designing the maximum design front curve to be ?3.00 D from ?3.75 to ?5.50; designing the maximum design front curve to be ?2.00 D from ?5.75 to ?8.75; and designing the maximum design front curve to be ?1.50 D from ?9.00 to ?15.00. The method of the present invention is mainly suitable for resin lenses with a refractive index of 1.60, 1.67 or 1.74.

Abstract: The present invention discloses a dyeable 1.74 resin lens and a preparation method thereof. The resin lens includes a module layer with a refractive index being 1.74, a dyeable layer with a refractive index being 1.60 is poured on an upper surface of the module layer, an upward curved degree of the dyeable layer is the same as an upward curved degree of the module layer, and a center thickness of the dyeable layer is 0.5-1.2 mm. According to the dyeable 1.74 resin lens of the present invention, a layer of dyeable 1.60plus resin lens is attached to a surface of a 1.74 lens, dyeing performance is good, a visible light transmittance can reach 10-30%, and the blank that the 1.74 lens cannot be dyed is filled.