CN105467617A - Defocused progressive multi-focus contact lens - Google Patents
Defocused progressive multi-focus contact lens Download PDFInfo
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- CN105467617A CN105467617A CN201610087549.8A CN201610087549A CN105467617A CN 105467617 A CN105467617 A CN 105467617A CN 201610087549 A CN201610087549 A CN 201610087549A CN 105467617 A CN105467617 A CN 105467617A
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- diffraction
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive
- G02C7/061—Spectacle lenses with progressively varying focal power
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- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Eyeglasses (AREA)
Abstract
A defocused progressive multi-focus contact lens which can both effectively prevent a visual step phenomenon from occurring and delay the diopter deepening progress is provided with a central optical zone. The central optical zone is provided with a short sight distance zone, a transition zone and a long sight distance zone; the short sight distance zone is provided with a first focus and a first optical center, and the long sight distance zone is provided with a second focus and a second optical center; multiple diffraction zones are distributed in the short sight distance zone, and prismatic power is added in the diffraction central zones to be matched with first diffraction focal power; multiple diffraction zones are distributed in the long sight distance zone, and prismatic power is added in the diffraction central zones to be matched with second diffraction focal power.
Description
Technical field
The present invention relates to the gradual multifocal contact lens of a kind of out of focus.
Background technology
Glasses in daily life increasing people be unable to do without, and are used for correcting eyesight, such as, correct myopia (myopia), farsightedness (long sight), astigmatism, presbyopia etc.Along with the lengthening of wear time, wearer produces dependence to glasses, and gradually, refractive diopter is progressively deepened.In the prior art, a lot of developer is at a kind of out of focus eyeglass of research and development, it is while correcting defects of vision, inverse adjustment can also be carried out to wearer's refractive diopter, attempt the paces slowing down refractive diopter intensification, but, in prior art, these eyeglasses are only limitted to glass or resin lens, not yet find that there is in hard contact lens the report adding out of focus degree.
Usually, we are commonly called as lens and comprise Worn type lens, haptic lens, intraocular lens, high embedding eyeglass etc., and lens of the present invention refers in particular to contact lens and contact lens.
In order to strengthen comfortable wearing degree, the gradual multifocal lens of current trend, wherein has the first focus in the myopia of eyeglass apart from district, has the second focus in the distance vision zone of another zones of different.Distance vision zone is for watching distant objects, and myopia for watching near objects, also arranges zone of transition with near-sighted in distance vision zone apart from district in the middle of district, watches the excessive of object, to avoid visually occurring step as to long sight distance and myopia distance.Wherein, in described myopia distance district, distance vision zone and zone of transition through main progressive meridian, adopt such eyeglass, greatly increase the comfort level of wearer.In multifocal lens, the most frequently used is exactly ultex.
Under normal circumstances, ultex Optical Region presents donut shape generally, have an inside center district and the outer annular zone around this center, this inside center district has first focal length and this outer annular zone has the second focal length that is different from the first focal length.Light through this inside center district forms an image at this first focal plane place, and forms an image through the light of outer annular zone at this second focal plane place.These images are projected on wearer's eye retina, form an image clearly, meanwhile, the lightwave signal that the image of projection coking before and after retina is then received by brain focusing flavine carries out filtration synthesis process, thus ignore blanking in the brain and fall, the picture rich in detail of coking is presented thus to user.
This lens design becomes gradual, namely one of them district is set to myopia apart from viewing area, a district is arranged to long sight distance viewing area, in myopia, zone of transition is set apart between viewing area and long sight distance viewing area, not only can effectively imaging, can also avoid occurring vision step phenomenon, human eye from near-sighted distance be transitioned into long sight distance from, or from long sight distance from being transitioned into near-sighted distance, because ciliary muscle can be expanded or shrink, so cause dizzy or of short duration ablepsia phenomenon instantaneously to occur, like this, owing to being provided with zone of transition, vision step phenomenon is effectively avoided to occur.
Along with the lengthening of wear time, human eye also increases gradually to glasses dependence, diopter can be caused like this to deepen further, in prior art, a variety of trial has been carried out in order to solve this problem, all end in failure, current popular a kind of out of focus means, can alleviate the process that diopter is deepened to a certain extent.
In prior art, there is not the gradual multifocal lens of out of focus, more there is not the gradual multifocal contact lens of out of focus.
Summary of the invention
Given this, in order to solve this technical problem, the invention provides one and can either effectively avoid vision step phenomenon to occur, the gradual multifocal contact lens of out of focus that diopter deepens process can be delayed again.
The invention provides the gradual multifocal contact lens of a kind of out of focus, there is central optical zone, this central optical zone has myopia apart from district, zone of transition and distance vision zone, it is characterized in that, described myopia has the first focus apart from district, first optical centre, light through the first optical centre forms the virtual image on the focal plane of this first focus, described distance vision zone has the second focus, second optical centre, light through the second optical centre forms the virtual image on the focal plane of this second focus, described first optical centre and the second optical centre are positioned to be determined by the interpupillary distance of human eye, and determine the optical centre of the entirety of described contact lenses, distribute multiple diffraction zone in this myopia distance district, the plurality of diffraction zone comprises a diffraction central area and the multiple diffraction annular concentric districts around this diffraction central area, this diffraction zone has first diffraction optical power relevant apart from district's focal power to this myopia, this myopia is apart from the converging light spot of the brightest order of diffraction of the corresponding nominal wavelength generation in corresponding described multiple diffraction zone, the first focus place in district, prism degree is added in this diffraction central area, with suitable with described first diffraction optical power, distribute multiple diffraction zone in this distance vision zone, the plurality of diffraction zone comprises a diffraction central area and the multiple diffraction annular concentric districts around this diffraction central area, this diffraction zone has second diffraction optical power relevant to this distance vision zone focal power, the converging light spot of the brightest order of diffraction of the corresponding nominal wavelength generation in corresponding described multiple diffraction zone, the second focus place of this distance vision zone, prism degree is added in this diffraction central area, with suitable with described second diffraction optical power.
According to the gradual multifocal contact lens of above-mentioned out of focus, it is characterized in that, each diffraction zone in the plurality of diffraction zone has a spherical profile.
Embodiment
Below by embodiment, the present invention is described in detail.
The invention provides the gradual multifocal contact lens of a kind of out of focus, there is central optical zone, this central optical zone has myopia apart from district, zone of transition and distance vision zone, described myopia has the first focus apart from district, first optical centre, light through the first optical centre forms the virtual image on the focal plane of this first focus, described distance vision zone has the second focus, second optical centre, light through the second optical centre forms the virtual image on the focal plane of this second focus, described first optical centre and the second optical centre are positioned to be determined by the interpupillary distance of human eye, and determine the optical centre of the entirety of described contact lenses, distribute multiple diffraction zone in this myopia distance district, the plurality of diffraction zone comprises a diffraction central area and the multiple diffraction annular concentric districts around this diffraction central area, this diffraction zone has first diffraction optical power relevant apart from district's focal power to this myopia, this myopia is apart from the converging light spot of the brightest order of diffraction of the corresponding nominal wavelength generation in corresponding described multiple diffraction zone, the first focus place in district, prism degree is added in this diffraction central area, with suitable with described first diffraction optical power, distribute multiple diffraction zone in this distance vision zone, the plurality of diffraction zone comprises a diffraction central area and the multiple diffraction annular concentric districts around this diffraction central area, this diffraction zone has second diffraction optical power relevant to this distance vision zone focal power, the converging light spot of the brightest order of diffraction of the corresponding nominal wavelength generation in corresponding described multiple diffraction zone, the second focus place of this distance vision zone, prism degree is added in this diffraction central area, to produce the out of focus degree suitable with described second diffraction optical power.
In the gradual multifocal contact lens of above-mentioned out of focus, each diffraction zone in the plurality of diffraction zone has a spherical profile.
The material of eyeglass can for comprise water and have in the property of water-bearing soft contact lens of flexibility, silicone-hydrogel soft contact lens, non-aqueous soft contact lens, oxygen permeability hard contact lens any one.
The present technology of contact lenses manufacture craft is very ripe, the molded mode of usual employing is formed, as the polymkeric substance of above-mentioned property of water-bearing soft contact lens monomer, such as hydroxyl (methyl) acrylate, dimethyl (methyl) acrylamide, the high molecular polymers such as vinyl pyrrolidone, as non-aqueous soft contact lens starting material such as: (methyl) n-butyl acrylate, (methyl) decyl acrylate, the polymkeric substance such as (methyl) lauryl acrylate, as the starting material of silicone-hydrogel soft contact lens and oxygen permeability contact lenses, the monomer-polymer of monomer or the siliceous high polymer monomers etc. such as such as silicon (methyl) alkyl acrylate and above-mentioned property of water-bearing soft contact lens.
Quantity as above-mentioned diffraction zone depends on many factors, such as contact lens size, basic optical focal power parameter etc.The brightest order of diffraction hot spot point that described myopia generates apart from district first focus and the corresponding given optical wavelength of distance vision zone second focus.
Prism degree is added in the central area of above-mentioned diffraction zone, this prism degree is relevant to the diopter of the central area of diffraction zone, usually, identical with the prism degree of distance vision zone apart from district in myopia, and be set to the dioptric arithmetic mean of diffraction central area or weighted mean value, both differences can also be arranged to, to produce the out of focus degree suitable with described second diffraction optical power.This series of actions is completed by optical CAD Software for Design, matches as long as it penetrates focal power with the first diffraction optical power and Second Sight.Here match (suitable) refer to the size of the prism degree added and polarity is carried out according to diffraction optical power, not cause eye to ache for minimum standard, more think close to above-mentioned value is unreasonable.
Although above, with reference to specific embodiment, invention has been described, and the present invention is not limited to this specific embodiment, and those skilled in the art can carry out various changes and modifications on this basis.Those skilled in the art understand, when not departing from aim of the present invention and spirit, the present invention can be applied to the optical base-substrate based on building window, windshield, indicator screen, lamp box etc., and scope of the present invention is only determined by claims.
Claims (2)
1. the gradual multifocal contact lens of out of focus, there is central optical zone, this central optical zone has myopia apart from district, zone of transition and distance vision zone, it is characterized in that, described myopia has the first focus apart from district, first optical centre, light through the first optical centre forms the virtual image on the focal plane of this first focus, described distance vision zone has the second focus, second optical centre, light through the second optical centre forms the virtual image on the focal plane of this second focus, described first optical centre and the second optical centre are positioned to be determined by the interpupillary distance of human eye, and determine the optical centre of the entirety of described contact lenses, distribute multiple diffraction zone in this myopia distance district, the plurality of diffraction zone comprises a diffraction central area and the multiple diffraction annular concentric districts around this diffraction central area, this diffraction zone has first diffraction optical power relevant apart from district's focal power to this myopia, this myopia is apart from the converging light spot of the brightest order of diffraction of the corresponding nominal wavelength generation in corresponding described multiple diffraction zone, the first focus place in district, prism degree is added in this diffraction central area, with suitable with described first diffraction optical power, distribute multiple diffraction zone in this distance vision zone, the plurality of diffraction zone comprises a diffraction central area and the multiple diffraction annular concentric districts around this diffraction central area, this diffraction zone has second diffraction optical power relevant to this distance vision zone focal power, the converging light spot of the brightest order of diffraction of the corresponding nominal wavelength generation in corresponding described multiple diffraction zone, the second focus place of this distance vision zone, prism degree is added in this diffraction central area, with suitable with described second diffraction optical power.
2. the gradual multifocal contact lens of out of focus according to claim 1, it is characterized in that, each diffraction zone in the plurality of diffraction zone has a spherical profile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610087549.8A CN105467617A (en) | 2016-02-16 | 2016-02-16 | Defocused progressive multi-focus contact lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610087549.8A CN105467617A (en) | 2016-02-16 | 2016-02-16 | Defocused progressive multi-focus contact lens |
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| CN105467617A true CN105467617A (en) | 2016-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610087549.8A Pending CN105467617A (en) | 2016-02-16 | 2016-02-16 | Defocused progressive multi-focus contact lens |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108803016A (en) * | 2018-06-11 | 2018-11-13 | 北京理工大学 | Zoom nest area's imaging method and system based on bifocal lens and liquid lens |
| CN110989062A (en) * | 2019-12-17 | 2020-04-10 | 中国科学院长春光学精密机械与物理研究所 | Multi-focus optical element and design method thereof |
| WO2022263994A1 (en) * | 2021-06-14 | 2022-12-22 | Alcon Inc. | Multifocal diffractive silicone hydrogel contact lenses |
| RU2818984C2 (en) * | 2021-06-14 | 2024-05-08 | Алькон Инк. | Multifocal diffraction silicone hydrogel contact lenses |
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| US20090323020A1 (en) * | 2008-02-21 | 2009-12-31 | Abbott Medical Optics Inc. | Toric intraocular lens with modified power characteristics |
| US8128222B2 (en) * | 2009-07-27 | 2012-03-06 | Valdemar Portney | Multifocal diffractive contact lens with bi-sign surface shape |
| CN102947749A (en) * | 2010-04-27 | 2013-02-27 | 卡尔蔡司医疗技术股份公司 | Multifocal lens |
| US20130090730A1 (en) * | 2008-10-20 | 2013-04-11 | Abbott Medical Optics Inc. | Multifocal intraocular lens |
| CN103941420A (en) * | 2014-04-08 | 2014-07-23 | 张家炳 | Far-sighted composite out-of-focus lens |
| CN103969849A (en) * | 2014-05-11 | 2014-08-06 | 万美林 | Method and glasses for lowering diopter of eyes |
| CN104020584A (en) * | 2013-03-01 | 2014-09-03 | 埃西勒国际通用光学公司 | Method for optimizing postural prism of ophthalmic lens |
| CN104246581A (en) * | 2012-02-21 | 2014-12-24 | 昆士兰科技大学 | Slowing myopia progression and/or the treatment or prevention of myopia or a disease or condition associated with myopia |
| CN104516121A (en) * | 2014-12-19 | 2015-04-15 | 张亚珍 | Eye muscle training glasses and lenses thereof |
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2016
- 2016-02-16 CN CN201610087549.8A patent/CN105467617A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090323020A1 (en) * | 2008-02-21 | 2009-12-31 | Abbott Medical Optics Inc. | Toric intraocular lens with modified power characteristics |
| US20130090730A1 (en) * | 2008-10-20 | 2013-04-11 | Abbott Medical Optics Inc. | Multifocal intraocular lens |
| US8128222B2 (en) * | 2009-07-27 | 2012-03-06 | Valdemar Portney | Multifocal diffractive contact lens with bi-sign surface shape |
| CN102947749A (en) * | 2010-04-27 | 2013-02-27 | 卡尔蔡司医疗技术股份公司 | Multifocal lens |
| CN104246581A (en) * | 2012-02-21 | 2014-12-24 | 昆士兰科技大学 | Slowing myopia progression and/or the treatment or prevention of myopia or a disease or condition associated with myopia |
| CN104020584A (en) * | 2013-03-01 | 2014-09-03 | 埃西勒国际通用光学公司 | Method for optimizing postural prism of ophthalmic lens |
| CN103941420A (en) * | 2014-04-08 | 2014-07-23 | 张家炳 | Far-sighted composite out-of-focus lens |
| CN103969849A (en) * | 2014-05-11 | 2014-08-06 | 万美林 | Method and glasses for lowering diopter of eyes |
| CN104516121A (en) * | 2014-12-19 | 2015-04-15 | 张亚珍 | Eye muscle training glasses and lenses thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108803016A (en) * | 2018-06-11 | 2018-11-13 | 北京理工大学 | Zoom nest area's imaging method and system based on bifocal lens and liquid lens |
| CN110989062A (en) * | 2019-12-17 | 2020-04-10 | 中国科学院长春光学精密机械与物理研究所 | Multi-focus optical element and design method thereof |
| WO2022263994A1 (en) * | 2021-06-14 | 2022-12-22 | Alcon Inc. | Multifocal diffractive silicone hydrogel contact lenses |
| RU2818984C2 (en) * | 2021-06-14 | 2024-05-08 | Алькон Инк. | Multifocal diffraction silicone hydrogel contact lenses |
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Application publication date: 20160406 |