TWI841471B - Contact lenses that slow down vision changes - Google Patents
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- TWI841471B TWI841471B TW112129998A TW112129998A TWI841471B TW I841471 B TWI841471 B TW I841471B TW 112129998 A TW112129998 A TW 112129998A TW 112129998 A TW112129998 A TW 112129998A TW I841471 B TWI841471 B TW I841471B
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- 230000004438 eyesight Effects 0.000 title claims abstract description 80
- 238000012937 correction Methods 0.000 claims abstract description 27
- 210000001525 retina Anatomy 0.000 claims abstract description 19
- 230000003287 optical effect Effects 0.000 claims abstract description 15
- 230000004308 accommodation Effects 0.000 claims description 15
- 230000004379 myopia Effects 0.000 claims description 6
- 208000001491 myopia Diseases 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 11
- 238000003384 imaging method Methods 0.000 abstract description 6
- 210000001508 eye Anatomy 0.000 description 13
- 210000005252 bulbus oculi Anatomy 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 230000001886 ciliary effect Effects 0.000 description 6
- 210000003205 muscle Anatomy 0.000 description 6
- 238000012546 transfer Methods 0.000 description 4
- 230000004410 intraocular pressure Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 210000002763 pyramidal cell Anatomy 0.000 description 2
- 230000002040 relaxant effect Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 206010020675 Hypermetropia Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000004456 color vision Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000004305 hyperopia Effects 0.000 description 1
- 201000006318 hyperopia Diseases 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000005043 peripheral vision Effects 0.000 description 1
- 230000004515 progressive myopia Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000002207 retinal effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
Description
本發明係有關於一種可趨緩視力變化之隱形眼鏡,尤指一種視力矯正用的隱形眼鏡。 The present invention relates to a contact lens capable of slowing down vision changes, particularly a contact lens for vision correction.
造成近視的主要原因是眼球光學構造的變異所造成,由於各種電子、電氣、3C產品的使用盛行,已導致學童近視發生年齡逐年下降,學童隨著年齡的增長,眼球也不斷增長,該眼球過度增長時,造成成像落在視網膜前而形成近視。 The main cause of myopia is the change in the optical structure of the eyeball. Due to the prevalence of various electronic, electrical, and 3C products, the age at which schoolchildren develop myopia has been decreasing year by year. As schoolchildren age, their eyeballs also continue to grow. When the eyeball grows excessively, the image falls in front of the retina, resulting in myopia.
人們眼睛通常帶有正像的球差,這使得非視網膜中心處的聚焦點通常落在視網膜之後,而當看近時,眼睛常借助睫狀肌收縮使水晶體聚光能力更強,便能對焦看的更清楚,因此長期的看近用眼習慣,使睫狀肌過使度用下,眼球就會感受壓力,而近視患者常有眼壓較高情形,較高的眼壓也迫使眼軸增長,這正是近視可能成因之一。 People's eyes usually have positive spherical aberration, which makes the focal point outside the center of the retina usually fall behind the retina. When looking at close objects, the eyes often use the ciliary muscles to contract to make the lens more capable of focusing light, so that they can focus and see more clearly. Therefore, long-term use of the eyes for close objects will cause the ciliary muscles to be overused, and the eyeball will feel pressure. Myopic patients often have higher intraocular pressure, and higher intraocular pressure also forces the eye axis to lengthen, which is one of the possible causes of myopia.
有鑑於此,累積從事此行多年之經驗,乃精心研究並不斷測試改良,如今終於發明出一種可趨緩視力變化之隱形眼鏡,可以摒除習用產品之缺點,以增進功效者。 In view of this, we have accumulated many years of experience in this field and have conducted careful research and continuous testing and improvement. Now we have finally invented a contact lens that can slow down vision changes, eliminate the shortcomings of conventional products, and enhance the effectiveness.
緣是,本發明之主要目的在於提供一種可趨緩視力變化之隱形眼鏡,主要使視網膜成像視角5度內能有充份的視力矯正,並使5度外的週邊聚焦點以連續漸進式的加大與視網膜間之距離,從而舒緩眼球壓 力,以達到趨緩視力變化之效果。 Therefore, the main purpose of the present invention is to provide a contact lens that can slow down vision changes, mainly to provide adequate vision correction within the retinal imaging angle of 5 degrees, and to increase the distance between the peripheral focal point and the retina in a continuous and gradual manner outside 5 degrees, thereby relieving eyeball pressure and achieving the effect of slowing down vision changes.
為達上述之目的,本發明提供一種可趨緩視力變化之隱形眼鏡,該隱形眼鏡係包含一光學區,該光學區中心部為含有增強視力的視力矯正區,該視力矯正區主要是讓光線的焦點呈現有彌散圓(circle of confusion)效果,能使成像光束以接近平行光的方式通過眼睛視網膜上的中央窩,以獲得更清晰的視力,達到眼球睫狀肌放鬆的效果,視力矯正區之外圍為連續變化式的視力調節區,該視力調節區所聚焦之像面呈弧型,該弧型與眼睛視網膜弧度產生差異時並在視網膜前時,可用以穩定近視視力之變化,在眼睛視網膜後則可用以穩定遠視視力之變化。 To achieve the above-mentioned purpose, the present invention provides a contact lens that can slow down vision changes. The contact lens includes an optical zone. The center of the optical zone is a vision correction zone that enhances vision. The vision correction zone mainly allows the focus of light to present a circle of confusion effect, which enables the imaging light beam to pass through the central fossa on the retina of the eye in a manner close to parallel light, so as to obtain clearer vision and relax the ciliary muscle of the eyeball. The periphery of the vision correction zone is a continuously changing vision accommodation zone. The image plane focused by the vision accommodation zone is arc-shaped. When the arc is different from the curvature of the retina and is in front of the retina, it can be used to stabilize the change of myopia vision. When it is behind the retina, it can be used to stabilize the change of hyperopia vision.
為了讓 貴審查委員對本發明有更進一步的了解,茲佐以圖式詳細說明本創作如下: In order to allow the Honorable Review Committee to have a deeper understanding of this invention, Zzo uses diagrams to illustrate this creation in detail as follows:
(100):隱形眼鏡 (100):Contact lenses
(10):光學區 (10):Optical area
(11):視力矯正區 (11): Vision correction area
(12):視力調節區 (12): Visual adjustment area
(13):前弧曲線 (13): Front arc curve
(14):後弧曲線 (14): Backward arc curve
(15):折射率 (15): Refractive index
(16):中心厚度 (16): Center thickness
第一圖:係本發明可趨緩視力變化之隱形眼鏡之平面示意圖。 Figure 1: A schematic plan view of the contact lens of the present invention that can slow down vision changes.
第二圖:係本發明可趨緩視力變化之隱形眼鏡之鏡片示意圖。 Figure 2: A schematic diagram of the contact lens of the present invention that can slow down vision changes.
根據本發明所提供可趨緩視力變化之隱形眼鏡,主要藉由控制鏡片的光學區之屈光力分佈,以為光學區增加視力矯正區範圍,也因而本發明不限制周邊部分之屈光力分佈,實務上周邊部分之視力調節區可依照產品需求提供不同的光學設計。 According to the contact lenses provided by the present invention, which can slow down vision changes, the refractive power distribution of the optical zone of the lens is mainly controlled to increase the range of the vision correction zone for the optical zone. Therefore, the present invention does not limit the refractive power distribution of the peripheral part. In practice, the peripheral vision adjustment zone can provide different optical designs according to product requirements.
請參閱第一圖所示,本發明可趨緩視力變化之隱形眼鏡100,包含一光學區10,該光學區10中心部為視力矯正區11,該視力矯正區11主要是讓光線的焦點呈現有彌散圓(circle of confusion)效果,能使成像光束以接近平行光的方式通過眼睛視網膜上的中央窩,以獲得更清晰的視力,達到眼球睫狀肌放鬆的效果,視力矯正區11之外圍為連續變化式的視力調節區12,該視力調節區12所聚焦之像面呈弧型,該弧型與眼睛視網膜弧度產生差異並在視網膜前時,可用以穩定近視視力之變化。視力矯正區11與視力調節區12有各自獨立的可變化式指數可分別控制,在控制視力矯正區11度數時,不會影響控制視力調節區12度數之變化。
Please refer to the first figure, the
按,人眼視網膜的中央位置有一大小不到兩毫米的凹陷處被稱作中央窩,其位置恰好也在水晶體的相反方向,此凹陷處有緊密聚集的錐狀細胞,該錐狀細胞除了負責人眼的彩色視覺外也對光線最為敏銳、視覺最清晰的地方,每當人們注視某項物體時,眼睛會有凝視現象,就是為了將物體影像投放到此位置上,以便獲得清楚的影像。本發明考量中央窩是呈一凹陷狀,因此鏡片設計中心增強視力的視力矯正區11須能涵蓋中央窩外,也將通過此區域的光路以近似平行光的方式通過,不同於光線只聚焦在一點上,該方式能確保視力被充份矯正。由於鏡片中心的視力矯正區11不同於視力調節區12,不做視力調節而有視力增強的效果,使視力被充份的矯正,眼球能更清楚成像時,睫狀肌就不再過度用力因此達到舒緩眼壓的效果,達到避免視力再惡化的功效。
According to the human eye, there is a depression less than two millimeters in the center of the retina, which is called the central fossa. It is located just opposite to the lens. There are densely clustered pyramidal cells in this depression. In addition to being responsible for the color vision of the human eye, the pyramidal cells are also the most sensitive to light and the place with the clearest vision. Whenever people focus on an object, their eyes will have a staring phenomenon, which is to project the image of the object to this position in order to obtain a clear image. The present invention considers that the central fossa is a depression, so the
請參閱第二圖所示,根據本發明,用於隱形眼鏡100鏡片中央含有視力增強功能的視力矯正區11及視力調節區12的前弧曲線(front curve)13,可用幾何光學的光線追跡y-nu方法及可描述軸對稱錐形面的二次方程式求得;其中決定透鏡屈光力的4個規格為前弧曲線(front curve)13、後弧曲線(back curve)14、折射率(refractive curve)15與中心厚度(center thickness)16,當隱形眼鏡100的後弧曲線14、折射率15及中心厚度16規格決定後,再將度數曲線及前後物距範圍設定後,透過光線追跡y-nu方法,再藉者不斷重覆折射過程(refracted porocedure)與轉移過程(transfer porocedure)的計算以求得。
其中:折射過程
Please refer to the second figure. According to the present invention, the
n'μ'=nμ+yc(n'-n)轉移過程 n'μ' = nμ + yc ( n' - n ) transfer process
cv=1/rd,rd為曲率半徑 cv=1/rd, rd is the radius of curvature
r 2=x 2+y 2 r 2 = x 2 + y 2
由於光具有可逆性,所以光學系統中物像關係是可以互換的,也就是說,若以像當做物,則光線由右至左經系統後,所成的像即為原來的物,
因此本發明可以決定成像面形狀,即屈光力分佈曲線再加上前後物距之後,經上述折射過程與轉移過程的光線追跡及二次方程式的計算求出隱形眼鏡100鏡片前弧曲線13上的座標點。
Since light is reversible, the relationship between the object and the image in the optical system is interchangeable. That is to say, if the image is regarded as the object, the image formed after the light passes through the system from right to left is the original object. Therefore, the present invention can determine the shape of the imaging surface, that is, the refractive power distribution curve plus the front and rear object distance, and then calculate the coordinate points on the
綜上所述,本發明可趨緩視力變化之隱形眼鏡,包含一光學區,該區中心部為含有視力增強的視力矯正區,該視力矯正區主要是讓光線的焦點呈現有彌散圓(circle of confusion)效果,能使成像光束以接近平行光的方式通過眼睛視網膜上的中央窩,以獲得更清晰的視力,達到眼球睫狀肌放鬆的效果,視力矯正區之外圍為連續變化式的視力調節區,該視力調節區所聚焦之像面呈弧型,該弧型與眼睛視網膜弧度產生差異時並在視網膜前時可用以穩定近視視力之變化。其實用功效當無庸置疑,而本發明又從未公諸於世或已見於其他刊物,實已符合專利法之規定,爰依法提出發明專利申請之。 In summary, the present invention is a contact lens that can slow down vision changes, comprising an optical zone, the center of which is a vision correction zone with enhanced vision. The vision correction zone mainly allows the focus of light to present a circle of confusion effect, which enables the imaging light beam to pass through the central fossa on the retina of the eye in a manner close to parallel light, so as to obtain clearer vision and achieve the effect of relaxing the ciliary muscle of the eyeball. The periphery of the vision correction zone is a continuously changing vision accommodation zone, and the image plane focused by the vision accommodation zone is arc-shaped. When the arc is different from the curvature of the retina of the eye and is in front of the retina, it can be used to stabilize the change of myopic vision. Its practical efficacy is beyond doubt, and this invention has never been made public or published in other publications, so it complies with the provisions of the Patent Law. Therefore, an invention patent application is filed in accordance with the law.
參考資料:(或引用專利) References: (or cited patents)
1. Effect of high add power, medium add power, or single vision contact lenses on myopia progression in children: theBLINK randomized clinical trial,” published August 11, 2020 in JAMA. DOI: 10.1001/jama.2020.10834 1. Effect of high add power, medium add power, or single vision contact lenses on myopia progression in children: the BLINK randomized clinical trial,” published August 11, 2020 in JAMA. DOI: 10.1001/jama.2020.10834
2. Wagner S, Conrad F, Bakaraju RC et al. Power profiles of single vision and multifocal soft contact lenses.Cont Lens Anterior Eye 2015;38:1 2-14. 2. Wagner S, Conrad F, Bakaraju RC et al. Power profiles of single vision and multifocal soft contact lenses. Cont Lens Anterior Eye 2015;38:1 2-14.
(100):隱形眼鏡 (100):Contact lenses
(10):光學區 (10):Optical area
(11):視力矯正區 (11): Vision correction area
(12):視力調節區 (12): Visual adjustment area
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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TWI297791B (en) * | 2003-11-19 | 2008-06-11 | Vision Crc Ltd | Methods and apparatuses for altering relative curvature of field and positions of peripheral, off-axis focal positions |
TW202309609A (en) * | 2021-04-29 | 2023-03-01 | 英商庫博光學國際有限公司 | Contact lenses for use in preventing or slowing the development or progression of myopia and related methods |
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Publication number | Priority date | Publication date | Assignee | Title |
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TWI297791B (en) * | 2003-11-19 | 2008-06-11 | Vision Crc Ltd | Methods and apparatuses for altering relative curvature of field and positions of peripheral, off-axis focal positions |
TW202309609A (en) * | 2021-04-29 | 2023-03-01 | 英商庫博光學國際有限公司 | Contact lenses for use in preventing or slowing the development or progression of myopia and related methods |
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