TWI572939B - Delay myopia with lenses - Google Patents

Description

Delaying myopia lenses

The present invention relates to a lens for delaying myopia, and more particularly to a lens disposed in a frame.

Myopia refers to the phenomenon that light from a distant place is focused on the retina, so distant objects are blurred for myopia. Myopia people usually wear traditional single-focal lenses according to the degree of their myopia, so that distant objects can be imaged on the central retina, so they can be clearly seen by myopia. However, the refracting of light through the lens to the vicinity of the peripheral retina is focused on the rear of the peripheral retina, which is one of the reasons for the deepening of myopia. In addition, the condition of deepening myopia is more obvious in children, and the severity of myopia will continue to increase until adulthood.

Therefore, in order to delay the speed of myopia in children, a contact lens for delaying the deepening of myopia appears on the market. Referring to FIG. 1, the contact lens 9 is divided into a bright view area 91 and a defocus area 92 according to the difference in diopter. The diopter of the defocusing zone 92 has an ADD rate, that is, the rate of increase of the diopter, compared to the diopter of the clear zone 91. With this, referring to FIG. 2, the clear viewing zone 91 enables the imaging of a distant object in the central region of the retina 93 to be focused on the retina 93, which can be placed in the retina 93. The imaging near the periphery is focused at the Q point in front of the retina 93. This can delay the speed of myopia deepening of the user wearing such contact lenses.

However, because the nearsighted are not all suitable for wearing contact lenses, the prior art has applied the above concept to the lens of the frame glasses, but this method needs to consider a number of factors that may affect the effect of delaying myopia, such as the pupil moving relative to the lens. For example, when a user watches a corner or a distant object such as a left or right car, the pupil of the eyeball will turn away from the side of the nose (ie, the side of the skull), and the distant object will be viewed through a defocusing area that deviates from the center of the lens. And when the user views a close object such as a mobile phone screen or a book, the pupil of the eyeball moves down and close to the nose side, while the close object is viewed through another part of the defocus area. Therefore, when the user changes the close object or the distant object viewed from the eyeball angle, it is necessary to see through the defocusing area having the same ADD rate, and thus feel dizzy. Furthermore, when the above concept is applied to the spectacle glasses, if the lens of a fixed size is cut only in accordance with the size of the frame, it is difficult to maintain the ratio of the area of the bright view area to the defocus area. In addition, the pupil distance, the AC/A value (accommodative convergence/accommodation ratio), the degree of cryptia, and the shape of the fundus (ie, the shape of the retina) of different myopic persons having the same degree may be different. If you wear the same lens, it will easily lead to delayed myopia.

Accordingly, it is at least an object of the present invention to provide a lens for delaying myopia which has a generally T-shaped clear vision zone and is located around the clear vision zone and has different ADD rates than the diopter of the clear vision zone. Multiple defocus areas. The user will view the laterally distant object or the close object through the clear vision zone to achieve the effect of delaying myopia while avoiding dizziness or visual fatigue.

Therefore, the lens for delaying myopia of the present invention comprises a clear viewing zone, a first defocusing zone, a second defocusing zone and a third defocusing zone. The clear vision zone has a standard refracting power and is generally T-shaped with a laterally extending transverse portion and a vertical portion extending downwardly from the vicinity of the central portion of the transverse portion. The first defocusing zone is above the clear vision zone and has a diopter having a first ADD rate relative to the standard dioptric power. The second defocusing zone is located below the transverse portion and on one side of the vertical portion, and its diopter has a second ADD rate relative to the standard diopter. The third defocusing zone is located below the transverse portion and on the other side of the vertical portion, and its diopter has a third ADD rate relative to the standard diopter.

In some implementations, the second ADD rate and the third ADD rate are different.

In some implementations, the first ADD rate varies progressively within the first defocusing zone.

In some embodiments, the value of the first ADD rate is primarily based on the diopter, axial length, and shape of the fundus of the user's eye.

In some implementations, the second ADD rate varies progressively within the second out-of-focus zone.

In some embodiments, the value of the second ADD rate is primarily based on the diopter, axial length, and shape of the fundus of the user's eye.

In some implementations, the third ADD rate varies progressively within the third out-of-focus zone.

In some implementations, the value of the third ADD rate is primarily based on the diopter, axial length, and shape of the fundus of the user's eye.

In some implementations, the vertical portion of the clear zone is tapered downward toward the third out of focus zone.

In some embodiments, the extent to which the vertical portion of the clear viewing zone is gradually biased downward toward the third defocusing zone is primarily set according to the AC/A value, the interpupillary distance, and the degree of strabismus of the user's eyeball.

In some embodiments, the diopter of the vertical portion of the clear zone has an ADD rate relative to the standard diopter.

In some embodiments, the diopter of the vertical portion of the clear zone relative to the standard diopter has an ADD rate that is primarily based on the AC/A value, the interpupillary distance, and the degree of strabismus of the user's eye.

In some embodiments, the transverse portion extends to the edge of the delayed myopia lens.

In some implementations, an area ratio between the clear area, the first defocus area, the second defocus area, and the third defocus area is primarily set according to a frame size.

The effect of the present invention is that the delayed myopia lens has a generally T-shaped clear vision zone and a plurality of defocus zones located around the clear vision zone and having different ADD rates compared to the diopter of the clear vision zone. The user will view the distant objects on both sides through the clear area and view the close objects through the vertical part to achieve the effect of delaying myopia while avoiding dizziness.

Referring to FIG. 3, an embodiment of the lens 1 for delaying myopia of the present invention is suitable for being embedded in a frame 2, and the frame 2 can be used to embed two lenses 1 for delaying myopia. For example, the delayed myopia lens 1 located on the left side of the nose 3 includes a clear view area 10, a first defocus area 11, a second defocus area 12, and a third defocus area 13. In general, the clear area 10 enables imaging of a distant object in the central region of the retina to focus on the retina, so that the user can obtain a clear image through the clear area 10; and the defocus areas 11, 12 13, can focus the imaging near the periphery of the retina in front of the retina, thus delaying the speed of the myopia deepening of the user wearing the embodiment.

In the present embodiment, the clear area 10 has a standard refracting power and is generally T-shaped with a laterally extending transverse portion 101 and a vertical portion 102 extending downwardly from the vicinity of the central portion of the transverse portion 101. It should be noted that the clear view area 10 is generally T-shaped, and the shape of the boundary may be a straight line or a curve according to actual needs, and is not limited to FIG. The first defocusing zone 11 is located above the clear zone 10 (i.e., above the lateral portion 101) and has a diopter having a first ADD rate relative to the standard dioptric power. The second defocusing zone 12 is located below the transverse portion 101 and on one side of the vertical portion 102, and its diopter has a second ADD rate relative to the standard diopter. In actual use, the second defocusing zone 12 It is adjacent to the user's side (ie away from the nose 3). The third defocusing zone 13 is located below the lateral portion 101 and on the other side of the vertical portion 102, and its diopter has a third ADD rate relative to the standard diopter. In actual use, the third defocusing zone 13 is located on the nasal side of the user (ie near the nose 3). In addition, in other embodiments, on the basis of maintaining the shape of the clear-light zone 10 in a T-shape, the defocusing zones 11, 12, and 13 should be separately distinguished from other smaller ones according to the demand. The focal zone is not limited to the drawings of the embodiment.

In the present embodiment, the lateral portion 101 extends to the edge of the delayed myopia lens 1 to provide a clear image of the user within the lateral viewing angle of the largest range. In detail, the area ratio between the clear area 10, the first defocusing area 11, the second defocusing area 12, and the third defocusing area 13 is mainly set according to the frame size, so that the use Get the best effect of slowing down myopia.

In this embodiment, the clear area 10 has a distance point 103. When the user views the distant object in front, the distance point 103 is aligned with the visual axis of the eye. In this embodiment, the The distance point 103 is located just in the center of the delayed myopia lens 1, but in other embodiments, the position of the distance point 103 should be determined according to the shape of the lens and the frame 2 itself, as long as the distance point 103 can be Just align the visual axis of the eye. In general, since the diopter of the user's eyeball on the nasal side and the temporal side has a certain degree of difference, in this embodiment, the second ADD rate is not the same as the third ADD rate, and can be designed to have A lens for delaying myopia is better for delaying the effect of vision. However, it is not limited thereto. In other implementation manners, if the second ADD rate is the same as the third ADD rate, it is also within the scope of the present invention. In this embodiment, the values of the first ADD rate, the second ADD rate, and the third ADD rate are respectively in the first defocusing area 11, the second defocusing area 12, and the third defocusing area 13 In a progressive manner, in detail, the values of the first ADD rate, the second ADD rate, and the third ADD rate are mainly based on the diopter, the axial length, and the shape of the fundus (ie, the shape of the retina) of each user's eyeball. The setting can therefore provide better delay for myopia for each user.

Referring to FIG. 4, when the user views the distant object on the side, the light is received through the transverse portion 101 of the bright-view region 10 of the delayed myopia lens 1 to obtain a clear image to delay the effect of myopia. At the same time avoid dizziness.

Referring to FIG. 5, when the user views a close object, for example, when reading, the pupil 4 will turn downward and approach the nose 3, and therefore, in the present embodiment, the vertical portion 102 of the clear area 10 is biased downward. The third defocusing zone 13 (i.e., laterally offset from the center), such that the pupil 4 can receive light from a close object through the vertical portion 102 to obtain a clear image. In detail, the extent to which the vertical portion 102 of the bright-view region 10 is gradually biased downward toward the third defocusing region 13 is mainly determined according to the AC/A value, the interpupillary distance, and the degree of squint of the user's eyeball. In addition, in the present embodiment, the diopter of the vertical portion 102 of the clear-light region 10 has an ADD rate with respect to the standard diopter, and provides a more appropriate diopter for the user when the user's pupil looks down at the close object. . In the present embodiment, the diopter of the vertical portion 102 of the clearing zone 10 relative to the standard diopter ADD rate is mainly set according to the AC/A value, the interpupillary distance and the degree of strabismus of the user's eyeball.

In summary, the present invention delays the myopia lens 1 to have the effect of delaying myopia, and the bright view region 10 includes a laterally extending lateral portion 101 and a vertical portion 102 so that the user can view the lateral direction through the transverse portion 101. The remote object can receive light from a close object through the vertical portion 103 to obtain a clear image to avoid dizziness. In addition, the vertical portion 102 of the bright-view region 10 is gradually biased downward toward the third defocusing region 13, and the diopter of the vertical portion 102 of the bright-view region 10 relative to the standard diopter is mainly based on the user. The setting of the AC/A value, the interpupillary distance and the degree of strabismus of the eyeball enables the present invention to provide the best effect of delaying myopia for different users while avoiding dizziness, so that the object of the present invention can be achieved.

However, the above is only the embodiment of the present invention, and the scope of the invention is not limited thereto, and all the equivalent equivalent changes and modifications according to the scope of the patent application and the patent specification of the present invention are still The scope of the invention is covered.

1‧‧‧Delaying lenses for myopia

10‧‧ ‧ Vision area

101‧‧‧ transverse

102‧‧‧ vertical

103‧‧‧Distance

11‧‧‧First defocus area

111‧‧‧First position

12‧‧‧Second defocusing area

121‧‧‧second position

13‧‧‧ Third defocus area

131‧‧‧ third position

2‧‧‧ Frame

3‧‧‧ nose

4‧‧‧ eyeballs

41‧‧‧瞳孔

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: FIG. 1 is a schematic diagram illustrating a conventional contact lens for delaying myopia deepening; FIG. 2 is a schematic view illustrating An out-of-focus area of the contact lens causes the object to appear in front of the retina; FIG. 3 is a schematic view showing an embodiment of the present invention for delaying the lens for myopia; FIG. 4 is a schematic view showing the user viewing the laterally distant object The position of the pupil is related to a clear area of the embodiment; and Fig. 5 is a schematic view showing the relationship between the position of the pupil and the clear area of the embodiment when the user views the close object.

1‧‧‧Delaying lenses for myopia

10‧‧ ‧ Vision area

101‧‧‧ transverse

102‧‧‧ vertical

103‧‧‧Distance

11‧‧‧First defocus area

111‧‧‧First position

12‧‧‧Second defocusing area

121‧‧‧second position

13‧‧‧ Third defocus area

131‧‧‧ third position

2‧‧‧ Frame

3‧‧‧ nose

Claims (3)

A lens for delaying myopia for a user to wear, the lens for delaying myopia comprises: a bright view region having a T-shape and having a laterally extending transverse portion and a vertical extending downward from a vicinity of the central portion of the transverse portion And providing the user with a clear image; a first defocusing zone located above the clearing zone; a second defocusing zone located below the transverse section and located on one side of the vertical section; A third defocusing zone is located below the cross section and on the other side of the vertical section. The lens for delaying myopia according to claim 1, wherein the vertical portion of the clear viewing zone is gradually biased downward toward the third defocusing zone. The lens for delaying myopia according to claim 1, wherein the lateral portion extends to an edge of the lens for delaying myopia.