CN204331182U

CN204331182U - Contact lenses

Info

Publication number: CN204331182U
Application number: CN201420747782.0U
Authority: CN
Inventors: 江春发
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-12-02
Filing date: 2014-12-02
Publication date: 2015-05-13
Anticipated expiration: 2024-12-02

Abstract

The utility model relates to a kind of contact lenses, defines an Optical Region and a peripheral region at an eyeglass.Optical Region is the opticator of eyeglass central authorities.Peripheral region is around around Optical Region and lighttight annular concentric region, in order to the light of periphery, blocking light school district, reduces the interference of Optical Region focal imaging, reaches the object of eyesight improving.

Description

Contact lenses

Technical field

The utility model relates to a kind of contact lenses, particularly a kind of can in order to the light of periphery, blocking light school district, reduce the interference of Optical Region focal imaging, reach the structure of the contact lenses of eyesight improving.

Background technology

Contact lens wear protection eyes or correct vision, belong to well-known technology.

The protection domain of eyes, mainly filters ultraviolet (UV) and/or the blue light of extraneous light, avoids eye damage.The for example contact lenses of the U.S.'s the 7th, 364, No. 291 Patent Cases disclosures, multiple concentric region is provided, these concentric region are made up of certain material, possesses the characteristic reducing or eliminating ultraviolet and blue light and penetrate, but do not forbid that the light of other wavelength enters the pupil of contact lens wearers.

The correcting range of eyesight, comprises myopia, presbyopic and astigmatism etc.For example, quite a lot of by the bitter number of myopia, especially the near-sighted population in region, Asia is more up to 75% or more.As for correcting method, carry out the number of degrees of myopia correction no more than wearing eyeglass.

But typical correcting lens cannot prevent the increase of myopia degree.So the U.S. the 7th, 637, No. 612 Patent Cases provide the contact lenses of multifocal distance to prevent the progress of myopia degree.There are the region of bending brightness depending on power far away in the Optical Region central authorities of this eyeglass, around at least one region that can provide positive longitudinal spherical aberration around it, but do not have the filtering of light or a screening effect.

In other words, light 30 according to Fig. 1 solid line and dotted line direction, can enter the eyeball 20 of contact lens wearers from the external world.

Described solid line direction, refers to that light 30 irradiates an object 40 and refracts to eyeglass 10, through the pupil 28 of iris 26 and through-fall crystal 22, focuses on a focus 34 and forms image 32 at retina 24.

Described dotted line direction, refers to that other extraneous light 30 are focused into another focus 34 at eyeball 20 equally, not only disturbs the image 32 that the light 30 in solid line direction is formed, and the smudgy erroneous judgement causing raw eyesight.

Therefore, how to improve the readability of image, just become the utility model and be badly in need of problem to be solved.

Utility model content

For solving the problems of the technologies described above, the purpose of this utility model is: provide a kind of contact lenses, and these contact lenses adopt the physical arrangement of pin hole, reduce the interference of extraneous light, contact lens wearers is obtained than prior art image more clearly, reaches the improvement of eyesight.

For achieving the above object, the technical scheme that the utility model adopts is: a kind of contact lenses, and it comprises: an eyeglass; One Optical Region is the border circular areas that these eyeglass central authorities define; And a peripheral region, this peripheral region be around this Optical Region around annular concentric region and lighttight.

Described contact lenses, this Optical Region has the diameter of 0.5mm to 5mm.

Described contact lenses, this peripheral region has the diameter of 8mm to 12mm.

Compared with prior art, the utility model has the advantage of of technique scheme is adopted:

Described eyeglass, comprises rigid or soft eyeglass.Wherein, hard lenses normally adopts PMMA polymkeric substance to make, then comparatively universal with rigid oxygen flow contact lenses (Rigid Gas-Permeable, is abbreviated as RGP) in the recent period.The strong material of water wettability is adopted to make, as HEMA polymkeric substance as soft lens.

Described Optical Region (Optic Zone), typically refers to the border circular areas that eyeglass central authorities possess the refractive power (Refractive Power) of rectification.

Described peripheral region, refers to that eyeglass is around the annular concentric region around Optical Region, and light tight.

Specifically, this Optical Region has the diameter of about 0.5mm to about 5mm; Then have an appointment the diameter of 8mm to about 12mm in peripheral region.

Because pupil size is controlled automatically by iris, be not driven by consciousness.So, the light of the meeting periphery, blocking light school district, peripheral region of eyeglass, reduces the interference that Optical Region focused ray forms image, reaches the object of eyesight improving.

Below, based on the object of accompanying drawing detailed description the implementation case, structure and feature, believe technology, means and beneficial effect that the utility model adopts, can obtain further and deeply concrete understanding.

Accompanying drawing explanation

Fig. 1 is the use schematic diagram of existing contact lenses;

Fig. 2 is the planimetric map of the utility model contact lenses one preferred embodiment;

Fig. 3 is the side view of the utility model contact lenses;

Fig. 4 is the utility model contact lenses using state figure.

Description of reference numerals: 10-eyeglass; 12-Optical Region; 14-peripheral region; 16-scrap region; 18-base arc; 20-eyeball; 22-crystalline; 24-retina; 26-iris; 28-pupil; 30-light; 32-image; 34-focus; 40-object.

Embodiment

Further describe the utility model below in conjunction with specific embodiment, advantage and disadvantage of the present utility model will be more clear along with description.But embodiment is only exemplary, does not form any restriction to scope of the present utility model.It will be understood by those skilled in the art that and do not departing under spirit and scope of the present utility model and can modify to the details of technical solutions of the utility model and form or replace, but these amendments and replacement all fall in protection domain of the present utility model.

Refer to Fig. 2, Fig. 3, illustrate the concrete structure of contact lenses.These contact lenses are eyeglasses 10, and the border circular areas of eyeglass 10 central authorities is defined as Optical Region 12, and will be considered as peripheral region 14 and scrap region 16 around two annular concentric region around Optical Region 12.

Described eyeglass 10 is arc lamellar bodies, and except peripheral region 14 is light tight, remainder can be passed by light.The eyeglass 10 of some embodiment, except Optical Region 12 by light through except, remainder is lighttight.

This Optical Region 12 is opticators of eyeglass 10, and the curvature at its back side represents the radian of eyeglass 10 negative camber central part, therefore is defined as a base arc 18.Base arc 18 is also known as central arc or main base arc, usually consistent with the curvature at canthus, possesses certain rectification refractive power.

The Optical Region 12 of the present embodiment, its diameter is approximately 1.5mm.Some embodiment, the diameter range of Optical Region 12 is between 0.5mm to 5mm.

Described peripheral region 14 is lighttight, the diameter range of restriction Optical Region 12.The maximum gauge of peripheral region 14, is substantially equal to the internal diameter of scrap region 16.

Described scrap region 16, refers to the corner cut-away area of eyeglass 10 outer rim, avoids cornea to be upset.Some embodiment, scrap region 16 and peripheral region 14 are all lighttight.

Then see Fig. 4, light 30 irradiates the eyeball 20 of contact lens wearers according to solid line and dotted line direction.

According to the light 30 of solid line directive object 40, refract through the Optical Region 12 of eyeglass 10, the pupil 28 of iris 26 and crystalline 22, focus at retina 24 and form image 32.

According to the light 30 of dotted line directive eyeball 20, district 14 produces refraction and cannot enter pupil 28 around, reduces the interference of retina 24 imaging.

Because of iris 26 involuntary control pupil 28 size, adapt to eyeglass 10 and reduce the light 30 of incident eyeball 20 with peripheral region 14, make contact lens wearers more can clearly identification object 40 profile than prior art, reach the object of eyesight improving.

Above-described embodiment is only explanation the utility model, and non-is restriction the utility model.The various changes that those skilled in the art derives from above-described embodiment, amendment and application, all in the category of the utility model protection.

Claims

1. contact lenses, is characterized in that, it comprises: an eyeglass; One Optical Region is the border circular areas that these eyeglass central authorities define; And a peripheral region, this peripheral region be around this Optical Region around annular concentric region and lighttight.

2. contact lenses as claimed in claim 1, it is characterized in that, this Optical Region has the diameter of 0.5mm to 5mm.

3. contact lenses as claimed in claim 1, it is characterized in that, this peripheral region has the diameter of 8mm to 12mm.