Multi-area contact lens with property of controlling progression of myopia and application method of multi-area contact lens
A contact lens and application method technology, applied in the field of vision correction, can solve the problems of photophobia, lack of a clear relationship and increase in the size of the defocus around the human eye of the contact lens, and achieve the effect of reducing the difficulty of processing
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Embodiment 1
[0034] The Atchison human eye model was established in the Zemax software, and its structural parameters are shown in Table 1. The myopic human eye model of SR=-3D is selected, then rc=7.704; vl=17.177; rx=-12.628, Qx=0.192; ry=-12.732, Qy=0.199. On the basis of this eye model, the optimal design and performance analysis of the contact lens is carried out. The lens body uses the silicone hydrogel material Balaficon A with a refractive index of 1.422.
[0035] Table 1 Structural parameters of Atchison's eye model
[0036]
[0037]
[0038] rc=7.77+0.022SR.
[0039] GradA=1.371+0.0652778Z-0.0226659Z2-0.0020399(X 2 +Y 2 ).
[0040] GradP=1.418-0.0100737Z2-0.0020399 (X 2 +Y 2 ).
[0041] vl=16.28-0.299SR.
[0042] rx=-12.91-0.094SR, Qx=0.27+0.026SR.
[0043] ry=-12.72+0.004SR, Qy=0.25+0.017SR.
[0044] Aperturetype: floatbystopsize.
[0045] according to figure 1 , 2 As shown in , 3, the present embodiment proposes a multi-zone contact lens capable of controlling ...
Embodiment 2
[0064] With reference to the design method in Example 1, only the size of the partition of the glasses body is changed, and the additional diopter of the second treatment area is increased,
[0065] according to figure 1 , 4 As shown in . The myopia correction zone 1 is an area that can completely correct myopia vision, the myopia treatment zone 2 is an area that can produce myopic defocus along the peripheral retina, and the front surface of the glasses body is rotationally symmetrical The multi-region aspheric / spherical surface type, and the front surface of the glasses body of the rotationally symmetrical multi-region aspheric / spherical surface type is divided by 5 radial coordinates A 1 、A 2 、A 3 、A 4 and A 5 Divided into five concentric radial areas, the five concentric radial areas are the first area, the second area, the third area, the fourth area and the fifth area from the inside to the outside, and the first area is myopia Correction area 1, the second area, ...
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