CN210514834U

CN210514834U - Composite defocusing multi-focus polyurethane lens

Info

Publication number: CN210514834U
Application number: CN201921237002.7U
Authority: CN
Inventors: 汪山献松; 陈国贵; 张孝; 侯大林; 李品秧
Original assignee: Shanghai Weixing Optical Co ltd
Current assignee: Shanghai Weixing Optical Co ltd
Priority date: 2019-08-02
Filing date: 2019-08-02
Publication date: 2020-05-12
Anticipated expiration: 2029-08-02

Abstract

The utility model relates to a compound out of focus multifocal polyurethane lens, characterized in that, the lens surface type adopts concentric circles structural design, there are two diopters in the ring lamellar structure inside of different diameters, diopter on the face is based on the diopter of the prescription for correcting vision ametropia, distribute a plurality of independent protruding calottes on the face, protruding calottes diopter have +0.25- +5.00D of adding light than the plane diopter; the convex dome design is a high order aspheric design. The lens adopts a concentric circle structure, and the possibility of multiple choices is provided for the defocusing design of the lens; except for myopic defocus around the eyeball of a myopic patient, partial light rays are imaged in front of the retina, so that the myopia of the teenagers is effectively delayed from being deepened. The concentric circle structure can well solve the problem that the defocusing effect is poor due to eye movement.

Description

Composite defocusing multi-focus polyurethane lens

Technical Field

The utility model relates to a lens production technical field, specific theory is a compound out of focus multifocal polyurethane lens.

Background

The statistical result in 2017 shows that the shortsightedness population in China is about 4.5 hundred million, and nearly one of every three people is the shortsightedness. Wherein, the serious-disaster area of myopia is the age range of teenagers of 10-18 years old, the incidence rate of myopia of the teenagers in China exceeds that of the other countries, and the teenagers are in the front of the world. The teenager period is a myopia high-incidence period, which is closely related to the development of human eyeballs. The structure of the human immature eyeball is relatively unstable, is easily interfered by foreign objects, is used for eyes at high strength and close distance, and is extremely unfavorable for the eyes. If the parent is not in control during this period, myopia occurs spontaneously. The number of people who are blinded due to myopia in China is about 30 thousands, and the reason is that the average number of teenagers in China is more than 5 myopia per 10 people, wherein 1 is high myopia, and the high myopia is likely to threaten the eye health of children and has larger threat. Too high myopia rate is already an unavoidable problem for modern people, and how to control the myopia should be done.

In drug control of myopia, atropine eye drops have the best effect of controlling myopia, but the action mechanism is unclear, and the atropine eye drops are generally considered to act through the non-regulation mechanism of the retina or sclera. More recently, researchers have proposed the effect of thickening the sclera. High-concentration atropine (1% atropine gel) is mainly used for optometry after infantile cycloplegia clinically, adverse reactions such as dry mouth, flushing, glare, photophobia, near vision blur and the like can be brought after long-term use, and rebound occurs after medicine withdrawal, so that the high-concentration atropine is rarely used for controlling myopia clinically. Low concentrations of atropine, such as 0.01% atropine eye drops, have relatively few side effects and no rebound after withdrawal, and are currently considered to be the preferred option for myopia control. However, 0.01% atropine eye drops have not been approved by the country and pharmaceutical companies are working on the relevant jobs.

The cornea contact lens and the excimer laser cornea refractive surgery can effectively achieve the aim of refractive correction. However, excimer laser corneal refractive surgery is prohibited for adolescents. The cornea shaping mirror also uses the theory of peripheral defocus to delay the myopic degree from deepening, and the peripheral defocus directly acts on the cornea, thereby having obvious control function on the myopic development. However, corneal contact lenses have great risks, and are prone to cause corneal infection and corneal endothelial cell depletion. Even extreme conditions such as corneal inflammation, perforation and lens blinding can occur.

From the current market feedback, frame glasses are also the main correction mode and the mode for controlling the myopia development of most myopia groups. The main method is progressive multi-focus frame glasses, and the progressive multi-focus lens realizes the addition of near positive power through the power change on the central sight channel of the lens. It is characterized by that on the lens the myopia number can be gradually reduced from upper portion to lower portion, so that when the wearer is looking at far distance, the wearer can adopt different numbers of myopia, and can attain the goal of relaxing and regulating. The peripheral defocus frame glasses slow down the elongation of the eye axis by reducing the principle of retina peripheral hyperopia defocus. With normal frame glasses (single vision lenses) there is a hyperopic defocus around the retina, i.e. the peripheral focus falls behind the retina. The out-of-focus lens can change the far-vision out-of-focus at the periphery of the retina into the near-vision out-of-focus, thereby inhibiting the increase of the axis of the eye to achieve the purpose of controlling the power. However, because the peripheral defocus in the peripheral out-of-focus frame glasses acts on the eyeball, there is some correlation between eyeball motion and myopia control effects.

Through patent search, domestic information about peripheral out-of-focus frame glasses is more, such as: CN201821948850.4 an eccentric out of focus lens when seeing near things, through eccentric out of focus district, alleviate the problem that the peripheral degree of lens is higher, and reducible hyperopia out of focus, be favorable to near-sighted prevention and control, the base of second prism is greater than the base of first prism simultaneously, the extraocular muscle relaxes when letting eyes see near things, see near just as seeing far, the base of the direction of first prism orientation second prism increases gradually simultaneously, can make the trigeminy physiological circulation obstacle of the eye muscle improve gradually, alleviate visual fatigue, the extraocular muscle of activity simultaneously, reduce fixed distance and use the eye, thereby relax the ciliary muscle. However, the lens cannot solve the problem that the defocusing effect is poor due to the movement of the eyeball. The lens described in japanese patent No. 4891249, the lens described in the patent document is a fresnel multifocal lens, which is also a concentric design in which at least one of these refractive areas, which is a first refractive area, has a first refractive power based on a prescription for correcting ametropia of an eye. Also, refractive regions other than the first refractive region have at least one refractive power different from the first refractive power, respectively. The technology can well solve the eye movement problem, and the defocusing effect can be guaranteed. However, when the wearer views an object using the lens, the wearer forms an image of the object on the retina and simultaneously forms an image at a point in front of the retina, and the images are overlapped to cause a ghost image of vision, which makes the wearer difficult to fit, thereby limiting the use of the series of spectacles.

The utility model discloses a compound out of focus multifocal lens, lens surface type adopt concentric circles structural design, have two diopters inside the ring lamellar structure of different diameters, and diopter is based on the diopter of the prescription of correcting eyesight ametropia usefulness on the face, is distributing a plurality of protruding calottes independent each other on the face, and protruding calottes diopter has +0.25- + 5.00D's light that adds than plane diopter. The number of concentric circles on the lens surface is between 5 and 1000. The diameter of the circular ring is between 0.1mm and 100 mm. The utility model discloses an adopt concentric circles structure, provide the possibility of multiple selection for lens out of focus design. The number of the concentric circles is more than or equal to 4, no limitation is placed on the number of the concentric circles, the diameter range of the concentric circles is 0.1mm to 100mm, and finer luminosity gradients can be made in different concentric circles, so that wearing comfort is improved. More diopters which accord with a prescription for correcting vision ametropia can be provided in concentric circles close to the center to ensure clear central vision and meet the normal vision requirement of a wearer during the visual distance. The concentric circle structure can well solve the problem that the defocusing effect is poor due to eye movement.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming prior art's not enough, providing a compound out of focus multifocal polyurethane lens, compound out of focus multifocal is compound out of focus multifocal abbreviation.

The purpose of the utility model is realized through the following technical scheme:

a compound defocusing multifocal polyurethane lens is characterized in that the surface shape of the lens adopts a concentric circle structure design, two diopters are arranged inside circular ring layered structures with different diameters, the diopter on the surface is based on the diopter of a prescription for correcting vision ametropia, a plurality of independent convex domes are distributed on the surface, and the diopter of each convex dome has +0.25- +5.00D of addition compared with the diopter on the plane.

The diameter of the concentric circles of the lens surface is between 0.1mm and 100 mm. The diameter of each convex tip circle is 0.01mm to 1.3mm, and the height is 0.01um to 4.0 um. The distance between two adjacent convex top circles is 0.01mm to 10 mm.

As a preferred scheme, for teenagers with different myopia diopters, polyurethane resin lenses with different refractive indexes and abbe numbers can be selected, and for teenagers with myopia degrees of more than-3.00D, the resin lenses made of polyurethane materials with the refractive index of 1.53 plus the abbe number of more than or equal to 58 are recommended; for teenagers with myopia degrees between-3.00D and-6.00D, the resin lens made of polyurethane materials with the refractive index of 1.60+ Abbe number more than or equal to 40 is recommended; for teenagers with myopia degrees of less than or equal to-6.00D, the resin lens made of polyurethane material with the refractive index of 1.67 plus the Abbe number of more than or equal to 30 is recommended. Preferably, the diameter of the lens is 80mm, the surface shape is designed by adopting a structure of 10 concentric circles, the diameter of the concentric circles is increased by a multiple of 8mm, the diameter of the first concentric circle is 8mm, the diameter of the second concentric circle is 10, and the like. Within each annular layered structure there are two diopters, the diopters on the face being based on the diopters of the prescription for correcting vision ametropia, there being a plurality of convex domes distributed on the face independently of one another, each convex dome having a plus of +0.50D diopter to the plane diopter in the first concentric circle. Each convex dome diopter within the second concentric circle has +1.00D addition to the plane diopter. Each convex dome diopter within the third concentric circle has +1.50D of add to the plane diopter. By analogy, each increment of one concentric circle increases diopter by 0.50D. Each convex tip circle has a diameter ranging from 0.05mm to 1.0mm and a height ranging from 0.01um to 2.0 um. The distance between the top circles of two adjacent bulges ranges from 0.1mm to 4 mm.

As a preferred scheme, for teenagers with different myopia diopters, polyurethane resin lenses with different refractive indexes and abbe numbers can be selected, and for teenagers with myopia degrees of more than-3.00D, the resin lenses made of polyurethane materials with the refractive index of 1.53 plus the abbe number of more than or equal to 58 are recommended; for teenagers with myopia degrees between-3.00D and-6.00D, the resin lens made of polyurethane materials with the refractive index of 1.60+ Abbe number more than or equal to 40 is recommended; for teenagers with myopia degrees of less than or equal to-6.00D, the resin lens made of polyurethane material with the refractive index of 1.67 plus the Abbe number of more than or equal to 30 is recommended. Preferably, the diameter of the lens is 80mm, the surface shape is designed by adopting a structure of 10 concentric circles, the diameter of the concentric circles is increased by a multiple of 8mm, the diameter of the first concentric circle is 8mm, the diameter of the second concentric circle is 10, and the like. Within each annular layered structure there are two diopters, the diopters on the face being based on the diopters of the prescription for correcting vision ametropia, there being a plurality of convex domes distributed on the face independently of one another, each convex dome having a plus of +0.50D diopter to the plane diopter in the first concentric circle. Each convex dome diopter within the second concentric circle has +1.00D addition to the plane diopter. Each convex dome diopter within the third concentric circle has +1.50D of add to the plane diopter. By analogy, each increment of one concentric circle increases diopter by 0.50D.

Compared with the prior art, the utility model has the positive effects that:

the utility model discloses an adopt concentric circles structure, provide the possibility of multiple selection for lens out of focus design. The number of the concentric circles is more than or equal to 5, no limitation is placed on the number of the concentric circles, the diameter range of the concentric circles is 0.1mm to 100mm, and finer luminosity gradients can be made in different concentric circles, so that wearing comfort is improved. The central concentric circles are close to the center, diopter which is more accordant with a prescription for vision ametropia can be provided, clear central vision is guaranteed, normal vision requirements of a wearer in far vision are met, the design of convex domes with different diopter addition is adopted in other circular ring structures, peripheral myopic defocus of eyeballs of myopes can be eliminated, partial light rays are imaged in front of the retina, and accordingly the deepening of myopia of teenagers is effectively delayed. The concentric circle structure can well solve the problem that the defocusing effect is poor due to eye movement.

Drawings

FIG. 1 is a schematic view of a composite through focus multifocal (composite through focus multifocal is an abbreviation for composite through focus multifocal) polyurethane lens, S₀The geometric center of the lens.

Detailed Description

The following provides a specific embodiment of the composite defocus multifocal polyurethane lens of the present invention.

Example 1

Referring to FIG. 1, a lens having a refractive index of 1.67, Abbe number of 30 and a lens power of-8.00D was produced. Injecting raw materials with the refractive index of 1.67 into a specific mould, curing, and then obtaining the required semi-finished blank lens through the processes of demoulding, edging, cleaning, hardening, filming, checking and the like. A compound defocus multifocal lens was processed in a car house setting, and the actual power was examined to-8.10D, with a lens diameter of 80 mm. The surface type adopts the structural design of 10 concentric circles, the diameters of the concentric circles are increased by multiples of 8mm, the diameter of the first concentric circle is 8mm, the diameter of the second concentric circle is 10, and the like. Within each annular layered structure there are two diopters, the diopters on the face being based on the diopters of the prescription for correcting vision ametropia, there being a plurality of convex domes distributed on the face independently of one another, each convex dome having a plus of +0.50D diopter to the plane diopter in the first concentric circle. Each convex dome diopter within the second concentric circle has +1.00D addition to the plane diopter. Each convex diopter within the third concentric circle has +1.50D addition to the planar diopter. By analogy, each increment of one concentric circle increases diopter by 0.50D. The diameter of each convex tip circle ranges from 0.5 mm. The distance between the top circles of two adjacent protrusions ranges from 0.5 mm. Meets the requirements.

Example 2

The refractive index was 1.60, Abbe number was 40, and the lens power was-4.00D. Injecting raw materials with the refractive index of 1.60 into a specific mould, curing, and then obtaining the required semi-finished blank lens through the processes of demoulding, edging, cleaning, hardening, filming, inspecting and the like. A composite through focus multifocal lens was processed in a car house facility to check the actual luminosity-4.05D. The lens diameter was 80 mm. The surface type adopts the structural design of 10 concentric circles, the diameters of the concentric circles are increased by multiples of 8mm, the diameter of the first concentric circle is 8mm, the diameter of the second concentric circle is 10, and the like. Within each annular layered structure there are two diopters, the diopters on the face being based on the diopters of the prescription for correcting vision ametropia, there being a plurality of convex domes distributed on the face independently of one another, each convex dome having a plus of +0.50D diopter to the plane diopter in the first concentric circle. Each convex dome diopter within the second concentric circle has +1.00D addition to the plane diopter. Each convex diopter within the third concentric circle has +1.50D addition to the planar diopter. By analogy, each increment of one concentric circle increases diopter by 0.50D. The diameter of each convex tip circle ranges from 0.25 mm. The distance between the top circles of two adjacent protrusions ranges from 0.5 mm. Meets the requirements.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the concept of the present invention, and these improvements and decorations should also be considered as within the protection scope of the present invention.

Claims

1. A compound defocusing multifocal polyurethane lens is characterized in that the surface shape of the lens adopts a concentric circle structure design, two diopters are arranged inside circular ring layered structures with different diameters, the diopter on the surface is based on the diopter of a prescription for correcting vision ametropia, a plurality of independent convex domes are distributed on the surface, and the diopter of each convex dome has +0.25- +5.00D of addition compared with the diopter on the plane.

2. A composite through focus multifocal polyurethane lens according to claim 1, characterized in that the number of concentric circles on the lens surface is between 5 and 1000.

3. A composite through focus multifocal polyurethane lens according to claim 1, characterized in that the diameter of the concentric circles of the lens surface is between 0.1mm and 100 mm.

4. The composite through focus multifocal polyurethane lens of claim 1, wherein each convex tip circle has a diameter of 0.01mm to 1.3mm and a height of 0.01 microns to 4.0 microns.

5. The compound defocus multifocal polyurethane lens of claim 1, wherein the distance between adjacent convex tip circles is 0.01mm to 10 mm.