CN203299469U

CN203299469U - Lens device

Info

Publication number: CN203299469U
Application number: CN2013202917478U
Authority: CN
Inventors: 吴怡璁
Original assignee: HILINE OPTICAL Co Ltd
Current assignee: HENGTAI OPTICAL CO., LTD.
Priority date: 2013-05-24
Filing date: 2013-05-24
Publication date: 2013-11-20
Anticipated expiration: 2023-05-24

Abstract

The utility model provides a lens device for a user to wear, for light rays to enter one eyeball of the user and form an image on the retina or close to the retina, and the lens device comprises a centre optical area and a periphery optical area sounding the centre optical area. The centre optical area is used for enable the light rays passing through the centre optical area to form the image on the retina. The periphery optical area is provided with a plurality of conjoint curvature sections, each curvature section enables the light rays passing through to form the image close to the retina, the degrees of crook of each two adjacent curvature sections are different, so that the distances between the image forming position of the light ray and the retina are different, the image forming positions are close to the front of the retina or are close to back of the retina. Therefore, probability of increasing position of the light ray image forming through the periphery optical area or the optimum distance position with the retina is realized.

Description

Lens device

Technical field

The utility model relates to a kind of lens device, particularly relates to a kind of lens device for eyesight control.

Background technology

Consult Fig. 1 and Fig. 2, existing a kind of eyeglass 1 for myopia control, comprise that the central optical zone 11 and of a circle is around central optical zone 11 peripheral Optical Region 12 on every side, central optical zone 11 has single curvature separately with peripheral Optical Region 12, wherein central optical zone 11 is the person's of being used in conjunction with eyesights, with so that light clearly images on

retina

19,12 of peripheral Optical Region are to make the Q point of image formation by rays before retina 19.Thus, can provide image clearly in visual field central authorities, the number of degrees due to peripheral visual field slightly have deficiency simultaneously, can delay or stop the situation of myopia development.

Each eyeglass that manufacturer makes, mainly being to provide different central optical zone 11 selects according to its number of degrees to the user, to adopt the single curvature that reduces by default number of degrees than the number of degrees of central optical zone 11 for 12 of peripheral Optical Region, so, in the situation that hypothesis people's eyeball is the body of rule, the distance of Q point and retina 19 will be as estimated in expecting.Yet why, therefore the curvature selection of peripheral Optical Region 12 can be a problem to the distance that present research it be unclear that aforesaid Q point and retina the best.In addition, people's eyeball and retina 19 are not the body of absolute rule, and therefore aforesaid Q point and amphiblestroid distance actually might not be as in advance desired.Therefore, how the position of the imaging of peripheral Optical Region 12 is designed and can be applicable to most people eyeball, reach the purpose that delays or stop myopia development of expection, just become a theme that is worth research.

Summary of the invention

The purpose of this utility model is to provide a kind of provides peripheral visual field a plurality of lens devices of image out of focus in various degree.

The utility model 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; 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.

Preferably, the intersection of described curvature section is discontinuous stepped or linking continuously.

Preferably, this central optical zone is low for the degree of crook of this periphery Optical Region.

Preferably, this lens device is a glasses eyeglass or a contact lens.

Preferably, 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 make the position of image formation by rays with predetermined speed rotation.

More preferably, this lens device is a contact lens.

The beneficial effects of the utility model are: the position that makes near image formation by rays a plurality of different distance this retina of passing through by this periphery Optical Region, the position that increases imaging near or position in the probability of the position with the retina optimum distance, and can be applicable to most people eyeball, reach the purpose that delays or stop the vision error heighten degree of expection.

Description of drawings

Fig. 1 is a floor map, and prior art is described;

Fig. 2 is a light path schematic diagram, and prior art is described;

Fig. 3 is a floor map, and the first preferred embodiment of the utility model lens device is described;

Fig. 4 is a light path schematic diagram, and this first preferred embodiment is described;

Fig. 5 is a floor map, and the second preferred embodiment of the utility model lens device is described; And

Fig. 6 is an elevational schematic view, and the prism section of this second preferred embodiment is described.

Embodiment

Below in conjunction with drawings and Examples, the utility model is elaborated.

Consult Fig. 3 and Fig. 4, the first preferred embodiment of the utility model lens device 2, wear for a user, and for light, by an eyeball 3 that enters this user, image near a retina 31 or this retina 31, this lens device 2 comprises a central optical zone 21 and a peripheral Optical Region 22 around this central optical zone 21.

The curvature of this central optical zone 21 can make image formation by rays by this central optical zone 21 on this retina 31, and in visual field central authorities, provides image clearly.

This periphery Optical Region 22 has the curvature section that multistage is connected, to have four curvature sections in the present embodiment, be respectively first curvature section 221, torsion section 222, the 3rd curvature section 223 and the 4th curvature section 224, but not as limit, can be also two, three, five and more than, or even 360 be curvature section of every degree.

Respectively this curvature section with so that the image formation by rays that passes through near this retina 31, the degree of crook of two adjacent curvature sections is different, and make the position of image formation by rays different from the distance of this retina 31, and in peripheral visual field, provide a plurality of images out of focus in various degree, the position that makes imaging near or the probability of position in the position with the retina optimum distance increase, and can be applicable to most people eyeball, reach the purpose that delays or stop the vision error heighten degree of expection.

It should be noted that, the position of aforesaid image formation by rays is different from the distance of this retina 31, caused by the two different degree of crook of adjacent curvature section, because user's retina 31 is erratic body, in general, although this of the position of image formation by rays and this retina 31, apart from the more difficult prediction of meeting, still can increase the probability that the position of imaging is close or position occurs in this situation with the retina optimum distance.

What in Fig. 4, signal presented primary importance P1 that first curvature section 221 in the present embodiment makes image formation by rays and retina 31 makes the different apart from d3 of the 3rd position P3 of image formation by rays and retina 31 apart from d1 and the 3rd curvature section 223.In the present embodiment, the degree of crook of this four curvature section is all not identical, they but, not as limit, can be also for example that first curvature section 221 is identical with the 3rd curvature section 223, torsion section 222 is identical with the 4th curvature section 224, and first curvature section 221 be different from torsion section 222.

Need to prove, the utility model lens device 2 is feasible on making, as described in european patent number EP0872307, mainly to use the turning method to add the vibrations of fixing a cutting tool, its principle is to make the vibrations of cutter accurately to coordinate the rotation of the rotating shaft of lathe, therefore revolve in the process that turns around in rotating shaft, the degree of depth of cutter cutting can change according to the angle of rotation, and can produce nonaxisymmetrical eyeglass.

It is worth mentioning that, in the present embodiment, the position of described imaging all is positioned near the place ahead of this retina 31, or all is positioned near the rear of this retina 31.

More specifically, the degree of crook of this periphery Optical Region 22 or rectification number of degrees that provide are provided this central optical zone 21 is low, that is to say, during wish treatment myopia, user's image-forming range before being corrected is too short, and after putting on this lens device 2, light can be imaged on retina 31 after this central optical zone 21 is corrected, and light can image near the place ahead of this retina 31 after this periphery Optical Region 22 is corrected.On the contrary, during wish treatment long sight, user's image-forming range before being corrected is long, and after putting on this lens device 2, light can be imaged on retina 31 equally after central optical zone 21 is corrected, and light can image near these retina 31 rears after this periphery Optical Region 22 is corrected.

What remark additionally is, it is discontinuous stepped that the intersection of described curvature section can be, and can be also continuously, progressively be connected, and dual mode is all feasible, visual demand is used different designs, for example can select according to the restriction on making or the restriction of optic diameter size.This lens device 2 is a contact lens in the present embodiment, but also can be a glasses eyeglass.

consult Fig. 5, 6, the second preferred embodiment and first embodiment of the utility model lens device 2 are roughly the same, it is that to aim at contact lens designed that its difference is in this lens device 2 of the present embodiment, this lens device 2 also comprises a marginarium around this periphery Optical Region 22 23, this marginarium 23 comprise a plurality of this lens device 2 one away from the prism section 231 of radially extending on the outside surface of this eyeball 3, described prism section 231 is all thick by being thinned in a clockwise direction in the present embodiment, but not as limit, can be also all with counterclockwise thick by being thinned to, adjust whereby the difference in height distance between thin and thick, gradient, make this lens device 2 rotate with predetermined speed in this eyeball the place ahead because of the action that the user blinks with predetermined speed when wearing, and then the position of imaging after making the multistage curvature section of this periphery Optical Region 22 and light by the multistage curvature section of peripheral Optical Region 22 is with predetermined speed rotation.Thus, can avoid upper some part of retina 31 (seeing Fig. 4) to continue, with the position of imaging, not good distance is arranged, and can be applicable to the eyeball 3 of most people, reach the purpose that delays or stop the vision error heighten degree of expection.

In sum, make near the position of image formation by rays a plurality of different distance this retina 31 of passing through by this periphery Optical Region 22, the position that makes imaging near or the probability of position in the position with retina 31 optimum distances increase, and the rotation by lens device 2, avoid some part on retina 31 to continue, with the position of imaging, not good distance is arranged, and can be applicable to most people eyeball 3, reach the purpose that delays or stop the vision error heighten degree of expection, therefore really can reach the purpose of the utility model.

As described above, it is only the preferred embodiment of the utility model, when not limiting with this scope of the utility model enforcement, the simple equivalence of namely generally according to the utility model claim and utility model description, being done changes and modifies, and all still belongs to the scope that the utility model is contained.

Claims

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:

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.