Methods of controlling aberration ratio through lens angle

Abstract

This invention relates to a method for controlling aberration ratios through lens angle. The method involves a lens placed on a pre-defined eyeball. By adjusting the slope, curvature, and width parameters of the first and second curved surfaces, myopic defocus and hyperopic defocus signals are generated in front of and behind the retina, respectively, thereby inducing the formation of higher-order aberration signals. Furthermore, based on different degrees of defocus ratios, higher-order spherical aberration ratios are modulated, which is used to control changes in visual acuity and inhibit axial elongation.

Claims

1. A method for controlling aberration ratio through lens angle, mainly comprising a lens disposed on a preset eyeball, wherein aberration ratio control is performed according to the following steps: (A01) adjusting the lens according to the vision of a preset user, and setting the first arc surface width radius of a spherical arc segment on the lens to be between 0.00 mm and 4.00 mm, and the second arc surface width radius to be between 2.50 mm and 4.60 mm; (A02) by adjusting the first arc surface, while correcting myopia, light in this area is allowed to fall on the retina and behind the retina, thereby forming hyperopic defocus; (A03) by controlling the second arc surface, light in this area is imaged in front of the retina, which can also be called myopic defocus; (A04) by adjusting the slope or curvature of the first and second arc surfaces, a modulation area of ​​higher-order aberration optical signals is defined, thereby forming a higher-order spherical aberration ratio by the ratio of different degrees of myopic defocus and hyperopic defocus; (A05) The changes in the user’s vision are controlled by the obtained higher-order spherical aberration ratio.

2. The method for controlling the aberration ratio through the lens angle as described in claim 1, wherein the first arc surface in step (A01) is a surface shape defined by an aspherical formula, a freeform surface formula, or a Zernike polynomial.

3. The method for controlling the aberration ratio through the lens angle as described in claim 1, wherein the curvature and width of the second arc surface are adjusted according to the height difference between the end position of the first arc surface and the outer periphery of the lens.

4. The method for controlling the aberration ratio through lens angle as described in claim 1, wherein the higher-order spherical aberration ratio in step (A04) includes Z11 and Z22 in a Zernike polynomial.

5. The method for controlling the aberration ratio through lens angle as described in claim 4, wherein the formula for the Z22 of the higher-order spherical aberration ratio is as follows.

6. The method for controlling the aberration ratio through the lens angle as described in claim 1, wherein the lens is a rigid lens, a soft lens, or an orthokeratology lens, and the first curved surface may be a base arc segment, while the second curved surface may be a reverse arc segment.

7. The method for controlling the aberration ratio through lens angle as described in claim 1, wherein the adjustment of the slope or curvature of the first arc surface and the second arc surface in step (A04) is achieved by changing the mirror depth parameter of the rear surface of the lens, wherein the mirror depth parameter is in the range of 1.00 mm to 5.00 mm.

8. The method for controlling the aberration ratio through lens angle as described in claim 1, wherein the adjustment of the slope or curvature of the first arc surface and the second arc surface in step (A04) is based on the preset ratio of hyperopic defocus to myopic defocus, and the surface shape formula is derived in reverse to determine the final lens surface shape.

9. The method for controlling the aberration ratio through the lens angle as described in claim 1, wherein the slope or curvature change of the rear surface of the lens is formed by a combination of multiple arc segments, and each segment can correspond to an aberration control target of a Zernike polynomial term.

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