CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a 371 US national stage application of PCT/CN2018/096071 filed Jul. 18, 2018, which claims the benefit of priority from Chinese Patent Application PCT/CN2017/093394 filed Jul. 18, 2017, the entire disclosures of which are herein incorporated by reference.

FIELD OF THE INVENTION

The invention relates to the field of glasses, in particular to a method and a device capable of recovering vision.

BACKGROUND OF THE INVENTION

In the description of the related art, an axial diopter is varied when two specially configured lenses are moved in parallel in a vertical and axial direction. In accordance with this principle, the related art has constructed eyeglasses that manually vary the diopter of the eyeglasses. However, the diopter variation range of the glasses is large, for example, between 0 and 1000 (i.e. [0/100, 1000/100] D or [0.0, 10.0] D), so that the adjustment precision is not high, and the problem of inaccurate diopter adjustment exists.

SUMMARY OF THE INVENTION

The embodiments of the invention provide a method and a device capable of recovering vision to solve the problems of low diopter adjustment precision and accuracy for glasses.

The method capable of recovering vision provided by the embodiments of the invention comprises the steps of:

dividing a diopter variation range [0, N] (i.e. [0/100, N/100] D) into n diopter intervals with continuous diopter variation;

setting the diopter variation ranges of the 1st to nth diopter intervals to [0, N/n], [1+N/n, 2N/n], . . . , and [1+(n−1)N/n, N] (i.e. [0/100, (N/n)/100] D), [(1+N/n)/100, (2N/n)/100] D, . . . , and [(1+(n−1)N/n)/100, N/100] D);

manufacturing a pair of glasses according to the vision recovery requirement of a user, wherein the diopter variation ranges of the left lens group and the right lens group of the glasses respectively correspond to one diopter interval of the n diopter intervals;

for any one of the left lens group and the right lens group, inquiring a current diopter of the lens group after receiving a desired diopter of the user;

determining an adjustment amount of the movable lens required to move relative to the stationary lens in the lens group according to the desired diopter and the current diopter; and

driving the movable lens to move by an electric drive module arranged in the glasses according to the adjustment amount of the movable lens required to move relative to the stationary lens.

Preferably, the manufacturing a pair of glasses according to the vision recovery requirement of a user, wherein the diopter variation ranges of the left lens group and the right lens group of the glasses respectively correspond to one diopter interval of the n diopter intervals, and the method comprise:

selecting a diopter interval corresponding to the left lens group and a diopter interval corresponding to the right lens group from the n diopter intervals according to the vision recovery requirement of the user;

for any one of the left lens group and the right lens group, determining a variation range of a diopter control amount Δ corresponding to the diopter interval of the lens group according to the corresponding relationship between the diopter and the diopter control amount Δ;

determining a variation range of a lens thickness t corresponding to the variation range of the diopter control amount Δ according to the corresponding relationship between the lens thickness t and the diopter control amount Δ; and

manufacturing a free-form curved lens into a movable lens and a stationary lens according to the variation range of the lens thickness t, and mounting them in a frame to form a pair of glasses.

Preferably, the diopter is approximately linearly related to the diopter control amount Δ.

Preferably, when the diopter variation range is [0, 1000] (i.e. [0/100, 1000/100] D), the corresponding Δ value has a variation range of [0, 0.02].

Preferably, the lens thickness t and the diopter control amount Δ satisfy the following formula: t=A((x+Δ)y2+(x+Δ)3/3), wherein x and y are an X-axis direction coordinate value and a Y-axis direction coordinate value of any point on the lens in a rectangular coordinate system with the lens center as a coordinate origin and the lens optical axis as a Z axis; and A is a parameter related to the refractive index of a lens material.

Preferably, the stationary lens is disposed in the frame to be stationary relative to the frame, the movable lens is disposed in the frame and relatively movable relative to the stationary lens, and the diopter of the lens group is varied within its corresponding diopter variation range by varying the position of the movable lens relative to the stationary lens.

Preferably, the desired diopter of the receiving user comprises:

receiving the desired diopter transmitted by the user via a user terminal by using a control module disposed in the frame or detachably connected with the frame.

Preferably, the determining an adjustment amount of the movable lens required to move relative to the stationary lens in the lens group according to the desired diopter and the current diopter comprises:

determining a moving distance of the movable lens corresponding to the desired diopter and a moving distance of the movable lens corresponding to the current diopter by using a corresponding relationship between the diopter and the moving distance of the movable lens; and

determining the adjustment amount of the movable lens required to move relative to the stationary lens according to the moving distance of the movable lens corresponding to the desired diopter and the moving distance of the movable lens corresponding to the current diopter.

Preferably, the difference between the current diopter and the desired diopter is at least equal to 1 (i.e. 1/100 D).

A device capable of recovering vision according to an embodiment of the present invention comprises:

a left lens group configured for being manufactured according to the vision recovery requirement of a user, wherein the diopter variation range of the left lens group is one of n diopter ranges with continuous diopter variation;

a right lens group configured for being manufactured according to the vision recovery requirement of the user, wherein the diopter variation range of the right lens group is one of the n diopter intervals;

a control module configured for inquiring a current diopter of the lens group after receiving a desired diopter of the user for any one of the left lens group and the right lens group, and determining an adjustment amount of the movable lens required to move relative to the stationary lens in the lens group according to the desired diopter and the current diopter; and

an electric drive module configured for driving the movable lens to move according to the adjustment amount of the movable lens required to move relative to the stationary lens;

wherein the n diopter intervals are obtained by dividing a diopter variation range [0, N] (i.e. [0/100, N/100] D), and the diopter variation ranges of the 1st to nth diopter intervals are [0, N/n], [1+N/n, 2N/n], . . . , and [1+(n−1)N/n, N] (i.e. [0/100, (N/n)/100] D, [(1+N/n)/100, (2N/n)/100] D, . . . , and [(1+(n−1)N/n)/100, N/100] D).

The technical solution provided by the embodiments of the invention has the following beneficial effects:

1. According to the embodiment of the invention, the larger diopter variation range is divided into a plurality of smaller diopter intervals, and the lens groups corresponding to the plurality of diopter intervals are manufactured, so that the axial diopter variation has a higher precision when the movable lens of the lens group moves in parallel in the vertical axis direction relative to the stationary lens.

2. According to the embodiment of the invention, the driving of the movable lens is realized by the electric drive module, and the movable lens moves more accurately relative to the stationary lens, so that the diopter adjusting accuracy is improved;

3. According to the embodiment of the invention, the user can set a desired diopter via a user terminal, so that the user can independently and accurately adjust the diopter in an electric drive mode.

