CN203299469U - Lens device - Google Patents

Abstract

A lens device for wearing by a user and for imaging light at or near a retina through an eye of the user includes a central optical zone and a peripheral optical zone surrounding the central optical zone. The central optical zone is used for imaging the light rays passing through the central optical zone on the retina. The peripheral optical zone is provided with a plurality of connected curvature sections, each curvature section is used for imaging the passing light rays near the retina, the bending degrees of two adjacent curvature sections are different, the distance between the light ray imaging position and the retina is different, and the imaging positions are both positioned near the front of the retina or both positioned near the rear of the retina. Therefore, the probability that the position of the light imaging passing through the peripheral optical area is close to or at the position with the optimal distance with the retina is increased.

Description

lens device

technical field

The utility model relates to a lens device, in particular to a lens device for vision control.

Background technique

Referring to Fig. 1 and Fig. 2, an existing lens 1 for myopia control comprises a circular central optical zone 11 and a peripheral optical zone 12 surrounding the central optical zone 11, the central optical zone 11 and the periphery Each of the optical zones 12 has a single curvature, wherein the central optical zone 11 is used to make the light image clearly on the retina 19 according to the vision of the user, and the peripheral optical zone 12 is used to make the light image on the Q point in front of the retina 19 . In this way, a clear image can be provided in the center of the visual field, and at the same time, the progression of myopia can be delayed or prevented due to the slightly insufficient power of the peripheral visual field.

The various types of lenses manufactured by the manufacturer mainly provide different central optical zones 11 for users to choose according to their powers. For the peripheral optical zone 12, a single curvature that is reduced by a preset power from the power of the central optical zone 11 is used, so , under the assumption that the human eyeball is a regular shape, the distance between the Q point and the retina 19 will be estimated as expected. However, the current research does not know what the optimal distance between the aforementioned Q point and the retina is, so the choice of curvature of the peripheral optical zone 12 will be a problem. In addition, the human eyeball and retina 19 are not absolutely regular shapes, so the aforementioned distance between the Q point and the retina may not necessarily be as expected in advance. Therefore, how to design the imaging position of the peripheral optical zone 12 so as to be suitable for most people's eyeballs and achieve the expected purpose of delaying or preventing the progression of myopia has become a topic worthy of research.

Contents of the invention

The purpose of the present invention is to provide a lens device that provides a plurality of out-of-focus images in different degrees in the peripheral field of view.

The lens device of the utility model is worn by a user, and allows light to pass through and enter the user's eyeball to form an image on a retina or near the retina. Light rays from the central optical zone are imaged on the retina; the lens assembly also includes:

A peripheral optical zone surrounding the central optical zone has a plurality of connected curvature segments, each of which is used to make the passing light image near the retina, and the bending degree of two adjacent curvature segments is different, so that the position of the light imaging The distances from the retina are different, and the imaging positions are all located near the front of the retina, or are all located near the rear of the retina.

Preferably, the junctions of the curvature segments are discontinuously stepped or connected continuously.

Preferably, the peripheral optic zone is less curved than the central optic zone.

Preferably, the lens device is a spectacle lens or a contact lens.

Preferably, the lens device further comprises a peripheral region surrounding the peripheral optical zone, the peripheral region comprising a plurality of radially extending prism segments on an outer surface of the lens device remote from the eyeball, said prism segments All in a clockwise direction from thin to thick, or all in a counterclockwise direction from thin to thick, so that the lens device is rotated at a predetermined rate by the user's blinking action when worn, thereby making the peripheral optical zone The curvature segment rotates at a predetermined rate the location where the light rays are imaged.

More preferably, the lens device is a contact lens.

The beneficial effect of the utility model is that: through the peripheral optical zone, the passing light is imaged at multiple positions with different distances near the retina, increasing the probability that the imaging position is close to or at a position with the optimal distance from the retina, and can be applied For most people's eyeballs, to achieve the expected purpose of delaying or preventing the deepening of vision deviation.

Description of drawings

Fig. 1 is a schematic plan view illustrating the prior art;

Fig. 2 is a schematic diagram of an optical path, illustrating the prior art;

Fig. 3 is a schematic plan view illustrating the first preferred embodiment of the lens device of the present invention;

Fig. 4 is a schematic diagram of an optical path, illustrating the first preferred embodiment;

Fig. 5 is a schematic plan view illustrating a second preferred embodiment of the lens device of the present invention; and

Fig. 6 is a schematic bottom view illustrating the prism segment of the second preferred embodiment.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in detail.

Referring to Fig. 3 and Fig. 4, the first preferred embodiment of the lens device 2 of the present invention is worn by a user, and allows light to pass through and enter the eyeball 3 of the user to form an image on a retina 31 or the retina Near 31 , the lens device 2 includes a central optical zone 21 and a peripheral optical zone 22 surrounding the central optical zone 21 .

The curvature of the central optical zone 21 can make the light passing through the central optical zone 21 image on the retina 31 to provide a clear image in the center of the visual field.

The peripheral optical zone 22 has a plurality of connected curvature segments, and in this embodiment has four curvature segments, which are respectively a first curvature segment 221, a second curvature segment 222, a third curvature segment 223 and a fourth curvature segment 224, But it is not limited thereto, and it can also be two, three, five or more, or even 360, that is, one curvature segment per degree.

Each of the curvature sections is used to make the passing light image near the retina 31, and the degree of curvature of two adjacent curvature sections is different, so that the distance between the imaging position of the light rays and the retina 31 is different, and multiple different levels are provided in the peripheral vision. The out-of-focus image increases the probability that the imaging position is close to or at the optimal distance from the retina, and can be applied to most people's eyeballs to achieve the expected purpose of delaying or preventing the deepening of vision deviation.

It should be noted that the distance between the position of the above-mentioned light imaging and the retina 31 is different, which is caused by the different degrees of curvature of two adjacent curvature segments. Since the user's retina 31 is in an irregular shape, generally speaking, although The distance between the light imaging position and the retina 31 is more difficult to predict, but still increases the probability that the imaging position is close to or at the optimal distance from the retina.

4 schematically shows that the distance d1 between the first position P1 where the first curvature section 221 makes light imaging and the retina 31 is different from the distance d3 between the third curvature section 223 that makes light imaging and the third position P3. In this embodiment, the four curvature segments have different degrees of curvature, but it is not limited thereto. For example, the first curvature segment 221 is the same as the third curvature segment 223, and the second curvature segment 222 is the same as the fourth curvature segment. Segments 224 are the same, while first curvature segment 221 and second curvature segment 222 are different.

It should be noted that the lens device 2 of the present utility model is feasible in manufacture. As described in European Patent No. EP0872307, it mainly uses the turning method plus the vibration of the cutting tool. The principle is to make the vibration of the cutting tool accurately match the rotating shaft of the lathe Therefore, during the rotation of the shaft, the cutting depth of the tool can be changed according to the rotation angle, so that non-axisymmetric lenses can be produced.

It is worth mentioning that, in this embodiment, the imaging positions are all located near the front of the retina 31 , or are all located near the rear of the retina 31 .

In more detail, the degree of curvature of the peripheral optical zone 22 or the degree of correction provided is lower than that of the central optical zone 21, that is to say, when the user wants to treat myopia, the imaging distance of the user is too short before being corrected, and in the After wearing the lens device 2 , the light corrected by the central optical zone 21 will be imaged on the retina 31 , and the light corrected by the peripheral optical zone 22 will be imaged near the front of the retina 31 . Conversely, when the user wants to treat hyperopia, the user's imaging distance is too long before being corrected, and after wearing the lens device 2, the light rays will also be imaged on the retina 31 after being corrected by the central optical zone 21, and then passed through the peripheral optics. After the area 22 is corrected, the light will be imaged near the rear of the retina 31 .

It is supplemented that the junction of the curvature segments can be in the shape of discontinuous steps, or it can be connected continuously and asymptotically. Both methods are feasible, and different designs can be used according to requirements, for example, according to Manufacturing restrictions, or restrictions on the size of the lens diameter to choose. In this embodiment, the lens device 2 is a contact lens, but it can also be a spectacle lens.

Referring to Figures 5 and 6, the second preferred embodiment of the lens device 2 of the present invention is substantially the same as the first embodiment, the difference being that the lens device 2 of this embodiment is specially designed for contact lens lenses, and the lens device 2 also includes an edge zone 23 surrounding the peripheral optic zone 22, the edge zone 23 comprising a plurality of radially extending prism segments 231 on an outer surface of the lens device 2 remote from the eyeball 3, said prism segments 231 in this embodiment is all in the clockwise direction from thin to thick, but it is not limited to this, it can also be all in the counterclockwise direction from thin to thick, thereby adjusting the height difference and inclination between thin and thick The slope makes the lens device 2 rotate at a predetermined rate in front of the eyeball at a predetermined rate due to the blinking action of the user when wearing, so that the multiple curvature segments of the peripheral optical zone 22 and light rays passing through the peripheral optical zone 22 The imaged position rotates at a predetermined rate after multiple curvature segments. In this way, some parts of the retina 31 (see FIG. 4 ) can be prevented from having an unfavorable distance from the imaging position, and can be applied to most people's eyeballs 3 to achieve the desired degree of delaying or preventing visual acuity deviation. purpose of deepening.

To sum up, through the peripheral optical zone 22, the passing light is imaged at multiple positions near the retina 31 at different distances, so that the probability of the imaging position being close to or at an optimal distance from the retina 31 is increased, and by The rotation of the lens device 2 prevents certain parts of the retina 31 from continuing to have an unfavorable distance from the imaging position, and can be applied to most people's eyeballs 3 to achieve the expected purpose of delaying or preventing the deepening of vision deviation , so really can reach the purpose of this utility model.

The above is only a preferred embodiment of the utility model, and should not limit the scope of the utility model implementation with this, that is, all simple equivalent changes made according to the utility model claims and utility model description content Modifications still fall within the scope of the present utility model.

Claims (6)

1. lens device, wear for a user, and form picture for light near a retina or this retina by an eyeball that enters this user, this lens device comprises: a central optical zone, with so that the image formation by rays by this central optical zone on this retina; It is characterized in that, this lens device also comprises:

The one peripheral Optical Region around this central optical zone, has the curvature section that multistage is connected, respectively this curvature section with so that the image formation by rays that passes through near this retina, the degree of crook of two adjacent curvature sections is different, and make the position of image formation by rays different from this amphiblestroid distance, and the position of described imaging all is positioned near this amphiblestroid the place ahead, or all is positioned near this amphiblestroid rear.

2. lens device according to claim 1 is characterized in that: the intersection of described curvature section is discontinuous stepped or be connected continuously.

3. lens device according to claim 1, it is characterized in that: the degree of crook of this periphery Optical Region this central optical zone is low.

4. according to claim 1 and 2 or 3 described lens devices, it is characterized in that: this lens device is a glasses eyeglass or a contact lens.

5. according to claim 1 and 2 or 3 described lens devices, it is characterized in that: this lens device also comprises a marginarium around this periphery Optical Region, this marginarium comprise a plurality of this lens device one away from the prism section of radially extending on the outside surface of this eyeball, described prism section is all thick by being thinned in a clockwise direction, or all with counterclockwise thick by being thinned to, make this lens device be subjected to rotate due to action that the user blinks with predetermined speed when wearing, and then make the described curvature section of this periphery Optical Region and the position of image formation by rays rotate with predetermined speed.

6. lens device according to claim 5, it is characterized in that: this lens device is a contact lens.

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