Dynamic optical zone structure for improving myopia control

Abstract

This invention provides a dynamic optical zone structure for improving myopia control. It mainly includes a lens body with a central optical zone and an equivalent defocus section formed within the central optical zone. The equivalent defocus section is configured by configuring at least one area with a reduced defocus power and adjusting the overall defocus effect according to the area of ​​the corresponding area. This results in an equivalent defocus amount in the central optical zone that differs from its reference power, allowing the user to maintain acceptable image quality in the direction of the primary line of sight. At the same time, it provides defocus stimulation on the retina that helps control vision. Compared with existing designs that set the defocus or blur effect in the peripheral optical zone, this invention forms the controlled equivalent defocus section in the central optical zone, achieving the effect of suppressing myopia power without significantly affecting central visual acuity.

Claims

1. A dynamic optical zone structure for improving myopia control, comprising a lens body, wherein: The lens body has a central optical zone in the center for focusing the line of sight, and a peripheral vision control zone is provided around the central optical zone. The inner surface of the central optical zone forms an equivalent defocus portion with a different power than the central optical zone.

2. The dynamic optical zone structure for improving myopia control as described in claim 1, wherein the equivalent defocus amount of the equivalent defocus portion of the lens body is calculated by weighting and integrating the defocus power of each distribution state within the central optical zone and its corresponding area, and the defocus power is calculated by the corresponding area. The calculation formula is: equivalent defocus amount of the pressure drop zone (D*mm2) = defocus power of the pressure drop zone (D) * area of ​​the pressure drop zone (mm2).

3. The dynamic optical zone structure for improving myopia control as described in claim 2, wherein the integral relationship between the defocus power of the equivalent defocus portion of the lens body and the area is expressed by the formula ∫ diopter × dA, thereby more accurately reflecting the visual defocus stimulus under actual wearing conditions.

4. The dynamic optical zone structure for improving myopia control as described in claim 1, wherein the lens body forms a tear film layer with a height between approximately 20 μm and 189 μm in a corresponding defocus region to stabilize the actual optical effect of the equivalent defocus portion.

5. The dynamic optical zone structure for improving myopia control as described in claim 1, wherein the lens body forms a tear film layer with a height between approximately 20 μm and 189 μm in a corresponding defocus region to stabilize the actual optical effect of the equivalent defocus portion.

6. The dynamic optical zone structure for improving myopia control as described in claim 1, wherein the equivalent defocus amount formed by the equivalent defocus portion in the lens body is a variable value between approximately 0.75D and 10.0D, adjusted according to the actual measured visual conditions of the user.

7. The dynamic optical zone structure for improving myopia control as described in claim 1, wherein the peripheral vision control zone of the lens body is divided into multiple vision correction zones in the form of an arc-shaped sheet by multiple transitional segments of different curvatures.

8. The dynamic optical zone structure for improving myopia control as described in claim 7, wherein the arc surfaces between the two adjacent vision correction zones of the lens body are formed by a first tangent and a second tangent extending to form intersecting arc tangent points, and the two arc tangent points extend upwards to form a first included angle line and a second included angle line with equal side lengths, thereby obtaining an included angle between the first included angle line and the second included angle line, and a shortest distance is formed between the two arc tangent points, and the curvature transition segment of the transition zone can be calculated by substituting the shortest distance between these vision correction zones into the geometric relationship of the included angle.

9. The dynamic optical zone structure for improving myopia control as described in claim 8, wherein the transition section of the lens body is a functional area occupied between different regions by minimizing the transition section. The geometric relationship between the two vision correction sections is calculated by the formula R = L ÷ [2 × sin(θ ÷ 2)]. The objective function for minimizing the radius of the transition section is derived through this formula to satisfy the continuity conditions of the tangent and curvature of each region, so as to ensure a smooth transition between different regions. Here, L is the length of the shortest distance, and θ is the angle of the included angle. The obtained R value is substituted into the curved surface formed by the curvature transition section.

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