TW201930963A - Progressive multi-focal lens and progressive multi-focal glasses - Google Patents

Abstract

A progressive multi-focal lens includes an inner surface and an outer surface facing away from the inner surface. At least one of the inner surface and the outer surface is a free-form surface. The free-form surface includes a near vision region, a distant vision region, and a transition region connecting the near vision region and the distant vision region. The progressive multi-focal lens includes an optical center and a geometric center line along a vertical direction. A distance between a reference point of the near vision region and a reference point of the distant vision region along a direction of the geometric center line is about 13 mm to about 25 mm. A distance between a reference point of the distant vision region and the optical center along a direction of the geometric center line is about 2 mm to about 5 mm.

Description

Progressive multifocal lens and progressive multifocal glasses

The invention relates to an ophthalmic lens and glasses, in particular to a progressive multifocal lens and progressive multifocal glasses using the progressive addition lens.

Wearing glasses can not only be used to correct a variety of vision problems (including myopia, hyperopia, astigmatism, presbyopia or strabismus), but also to protect the eyes or for decorative purposes. In daily life, each user is usually not limited to wearing only one pair of glasses. For example, for middle-aged and elderly people, there may be problems with both myopia and presbyopia. When you need to see the near objects, you need to wear reading glasses, but the distant object system can not be seen. Therefore, when you need to see a distant object, you need to replace it with myopia glasses. Frequent replacement of glasses will undoubtedly bring a lot of inconvenience to users.

In view of the above, it is necessary to provide a progressive addition lens that solves the above technical problems.

In addition, it is also necessary to provide a progressive multifocal lens to which the progressive addition lens described above is applied.

A progressive addition lens comprising an inner surface and an outer surface disposed opposite the inner surface, at least one of the inner surface and the outer surface being a free curved surface, the free curved surface comprising a progressive multifocal a near vision zone at a lower portion of the lens, a distance vision zone at an upper portion of the progressive addition lens, and a transition zone connecting the near vision zone and the distance vision zone, the progressive addition lens further including an optical center and a distance from the reference point of the near vision zone to the optical center in the direction of the geometric centerline of 13 mm to 25 mm, passing through the optical center and the geometric center line in the up and down direction, the distance vision zone The distance between the reference point and the optical center in the direction of the geometric center line is 2 mm to 5 mm.

Further, a distance between a reference point of the near vision zone and a reference point of the remote view zone in a direction perpendicular to the geometric center line is 0.2 mm to 2.0 mm.

Further, the diopter of the distance vision zone is -8.0D~0D, the adder of the progressive addition lens is 0D~+3.5D, and the astigmatism of the progressive addition lens is -3.5D~0D.

Further, the visual width at the reference point of the near vision zone is 10 mm to 35 mm, and the visual width at the reference point of the near vision zone is 10 mm to 35 mm.

Further, the transition zone of the progressive addition lens has a channel length of 15 mm to 30 mm, and the transition zone has a narrowest width of 2 mm to 7 mm.

A progressive multifocal lens comprising a frame and two progressive multifocal lenses embedded in the frame, each progressive addition lens comprising an inner surface and an outer surface disposed opposite the inner surface, At least one of the inner surface and the outer surface is a free curved surface, the free curved surface includes a near vision zone at a lower portion of the progressive addition lens, a distance vision zone at an upper portion of the progressive addition lens, and a connection to the near vision And a transition zone of the remote viewing zone, the progressive addition lens further comprising an optical center and a geometric center line passing through the optical center and in an up and down direction, the reference point of the near vision zone The distance of the optical center in the direction of the geometric center line is 13 mm to 25 mm, and the distance between the reference point of the distance viewing zone and the optical center in the direction of the geometric center line is 2 mm to 5 mm.

Further, a distance between a reference point of the near vision zone and a reference point of the remote view zone in a direction perpendicular to the geometric center line is 0.2 mm to 2.0 mm.

Further, the diopter of the distance vision zone is -8.0D~0D, the adder of the progressive addition lens is 0D~+3.5D, and the astigmatism of the progressive addition lens is -3.5D~0D.

Further, the visual width at the reference point of the near vision zone is 10 mm to 35 mm, and the visual width at the reference point of the near vision zone is 10 mm to 35 mm.

Further, the transition zone of the progressive addition lens has a channel length of 15 mm to 30 mm, and the transition zone has a narrowest width of 2 mm to 7 mm.

The surface parameter setting of the progressive multifocal lens reduces the adjustment range of the lens to the eyeball, slows the eyeball fatigue, greatly increases the visual area of the adjustment, and connects the far-use zone and the near-use zone by using the curved gradient corridor, and the gentle transition is due to The visual trajectory of the eyeball changes in a visual shape. After the main vision enters the far-use zone and the near-use zone, the side-side light vision enters the corresponding view zone, and a seamless visual transition effect can be achieved. When the trans-vision zone changes, the adjustment of the eyeball is small and gentle, so it can reduce the fatigue of the eyeball. In addition, the progressive multifocal lens is preferably applied to glasses used in water such as goggles, frog mirrors, etc., and the surface parameters thereof meet the needs of underwater sports such as swimming, and can reduce the visual difference caused by water when used in water, so that the use The visual clarity in the water improves safety.

Referring to FIGS. 1 to 2, a preferred embodiment of the present invention provides a progressive addition lens 1 including an inner surface 11 and an outer surface 13 disposed opposite the inner surface 11. At least one of the inner surface 11 and the outer surface 13 is a free curved surface. In this embodiment, the free curved surface is a complex non-rotationally symmetric free curved surface.

In this embodiment, the inner surface 11 is a free curved surface, and the outer surface 13 is a spherical surface. In other embodiments, the outer surface 13 can also be aspherical.

The free curved surface includes a near vision zone 111, a distance vision zone 113, a transition zone 115 (ie, a gradation channel), and an astigmatism zone 117.

The near vision zone 111 is located at a lower position of the progressive addition lens 1, and the distance vision zone 113 is located at an upper position of the progressive addition lens 1. The transition zone 115 is located at a substantially central position of the progressive addition lens 1 and connects the near vision zone 111 and the distance vision zone 113. The near vision zone 111, the distance vision zone 113, and the transition zone 115 are effective visual zones of the progressive addition lens 1. The astigmatism area 117 is a portion other than the distance viewing area 111, the distance viewing area 113, and the transition area 115, and has a large astigmatism, and generally cannot be used for observation.

The progressive addition lens 1 has an optical center O and a geometric center line I passing through the optical center O and passing through the near vision zone 111 and the distance vision zone 113 in the up and down direction, the near The viewing zone 111 has a reference point A, which has a reference point B.

The diopter of the distance vision zone 113 is -8.0D~0D, the addition degree of the progressive addition lens 1 is 0D~+3.5D, and the astigmatism of the progressive addition lens 1 is -3.5D~0D.

The transition zone 115 of the progressive addition lens 1 has a channel length of 15 mm to 30 mm. The narrowest width of the transition zone 115 is 2 mm to 7 mm.

The visual width at the reference point B of the distance vision zone is 10 mm to 35 mm, and the visual width at the reference point A of the near vision zone is 10 mm to 35 mm.

The distance between the reference point A of the near vision zone and the optical center O in the direction of the geometric center line I is 13 mm to 25 mm, and the reference point B of the distance vision zone and the optical center O are in the The distance in the direction of the geometric center line I is 2 mm to 5 mm. The distance between the reference point A of the near vision zone and the reference point B of the remote view zone in a direction perpendicular to the geometric centerline I is 0.2 mm to 2.0 mm. In this embodiment, the reference point B of the distance vision zone is located on the geometric center line I.

The invention will now be specifically described by way of examples.

Example 1

The specific parameters of the progressive addition lens 1 of the present embodiment are as follows: the distance between the near vision zone reference point A and the optical center O in the geometric center line direction is 13.00 mm, and the distance vision zone reference The distance between the point B and the optical center O in the direction of the geometric center line is 3.00 mm. The distance between the near vision zone reference point A and the distance vision zone reference point B in a direction perpendicular to the geometric centerline is 1.40 mm. The diopter of the distance vision zone 113 is +0D, the addition degree of the progressive addition lens 1 is +1.0D, and the astigmatism luminosity of the progressive addition lens 1 is +0D. The transition zone of the progressive addition lens 1 has a channel length of 16 mm. The transition zone 115 has a narrowest width of 3.5 mm. The visual width at the distance viewing zone reference point B is 32.81 mm, and the visual width at the near viewing zone reference point A is 14.20 mm. 3 is a chromaticity contour map of the surface of the progressive addition lens 1, and FIG. 4 is an astigmatism contour map of the surface of the progressive addition lens 1.

Example 2

The specific parameters of the progressive addition lens 1 of the present embodiment are as follows: the distance between the near vision zone reference point A and the optical center O in the geometric center line direction is 13.7 mm, and the distance vision zone reference The distance between the point B and the optical center O in the direction of the geometric center line is 3.2 mm. The distance between the near vision zone reference point A and the distance vision zone reference point B in a direction perpendicular to the geometric centerline is 1.4 mm. The diopter of the distance vision zone 113 is -2.0D, the addition degree of the progressive addition lens 1 is +1.5D, and the astigmatism luminosity of the progressive addition lens 1 is +0D. The transition length of the transition zone 115 of the progressive addition lens 1 is 16.5 mm. The transition zone 115 has a narrowest width of 3 mm. The visual width at the distance viewing zone reference point B is 32 mm, and the visual width at the near viewing zone reference point A is 13.4 mm. 5 is a chromaticity contour map of the surface of the progressive addition lens 1, and FIG. 6 is an astigmatism contour map of the surface of the progressive addition lens 1.

Example 3

The specific parameters of the progressive addition lens 1 of the present embodiment are as follows: the distance between the near vision zone reference point A and the optical center O in the geometric center line direction is 13.2 mm, and the distance vision zone reference The distance between the point B and the optical center O in the direction of the geometric center line is 3.5 mm. The distance between the near vision zone reference point A and the distance vision zone reference point B in a direction perpendicular to the geometric centerline is 1.4 mm. The diopter of the distance vision zone 113 is -2.5D, the addition degree of the progressive addition lens 1 is +2.0D, and the astigmatism luminosity of the progressive addition lens 1 is +0D. The transition length of the transition region 115 of the progressive addition lens 1 is 16.8 mm. The transition zone 115 has a narrowest width of 3 mm. The visual width at the distance viewing zone reference point B is 31 mm, and the visual width at the near viewing zone reference point A is 12.8 mm. 7 is a chromaticity contour map of the surface of the progressive addition lens 1, and FIG. 8 is an astigmatism contour map of the surface of the progressive addition lens 1.

The material of the progressive addition lens 1 may be polycarbonate, polymethyl methacrylate or a cyclic block copolymer (Cyclic Block Copolymer), and may be other materials commonly used in the art, which will not be described in detail herein.

In other embodiments, the progressive addition lens 1 may further include a functional film (not shown) formed on at least one of the inner surface 11 and the outer surface 13. The functional film may be selected from at least one of, but not limited to, a hard film, an antireflection film, an antifogging film, a dustproof film, a water repellent film, an anti-fingerprint film, an anti-ultraviolet film, and an anti-blue film.

Referring to FIG. 9 , a progressive addition lens 2 includes a frame 21 and two progressive addition lenses 1 embedded on the frame 21 . The progressive addition lens 2 can be other functional glasses, such as goggles, safety glasses or sunglasses, in addition to ordinary glasses that are worn everyday.

The surface parameter setting of the progressive addition lens 1 of the invention reduces the adjustment range of the lens to the eyeball, slows the eyeball fatigue, greatly increases the adjusted visual area, and connects the far-use zone and the near-use zone by using the curved gradient corridor, which is gentle. In the transition, due to the movement of the eyeball, the visual receiving change is an arc-shaped change. After the main vision enters the far-use zone and the near-use zone, the side-side light vision enters the corresponding view zone again, and a seamless visual transition effect can be achieved. Therefore, when the cross-viewing zone changes, the adjustment of the eyeball is small and gentle, so the fatigue of the eyeball can be reduced. In addition, the progressive addition lens 1 of the present invention is preferably applied to glasses used in water such as goggles, frog mirrors, etc., and the surface parameters thereof meet the needs of underwater sports such as swimming, and can reduce the visual difference caused by water when used in water. The user's visual clarity in the water improves safety.

In addition, various other changes and modifications may be made in accordance with the technical concept of the present invention, and all such changes and modifications are intended to fall within the scope of the invention.

1‧‧‧ progressive multifocal lens

11‧‧‧ inner surface

13‧‧‧ outer surface

111‧‧‧Close field of view

113‧‧‧Distance

115‧‧‧Transition zone

117‧‧‧Alias

O‧‧·Optical Center

I‧‧‧Geometry center line

A, B‧‧‧ reference point

2‧‧‧ progressive multifocal glasses

21‧‧‧ frames

1 is a perspective view of a progressive addition lens according to a preferred embodiment of the present invention.

2 is a structural view of the progressive addition lens shown in FIG. 1.

Figure 3 is a refracting contour map of the progressive addition lens surface of Example 1 of the present invention.

Figure 4 is an astigmatism contour map of the progressive addition lens surface of Example 1 of the present invention.

Figure 5 is a refracting contour map of the progressive addition lens surface of Example 2 of the present invention.

Figure 6 is an astigmatism contour map of the progressive addition lens surface of Example 2 of the present invention.

Figure 7 is a refracting contour map of the progressive addition lens surface of Example 3 of the present invention.

Figure 8 is an astigmatism contour map of the progressive addition lens surface of Example 3 of the present invention.

Figure 9 is a perspective view of progressive multifocal glasses in accordance with a preferred embodiment of the present invention.

Claims (10)

A progressive addition lens comprising an inner surface and an outer surface disposed opposite the inner surface, at least one of the inner surface and the outer surface being a free curved surface, the free curved surface comprising a progressive multifocal a near vision zone at a lower portion of the lens, a distance vision zone at an upper portion of the progressive addition lens, and a transition zone connecting the near vision zone and the distance vision zone, the progressive addition lens further including an optical center and a distance from the reference point of the near vision zone to the optical center in the direction of the geometric centerline of 13 mm to 25 mm, passing through the optical center and the geometric center line in the up and down direction, the distance vision zone The distance between the reference point and the optical center in the direction of the geometric center line is 2 mm to 5 mm. The progressive addition lens of claim 1, wherein a distance between a reference point of the near vision zone and a reference point of the distance vision zone in a direction perpendicular to the geometric centerline is 0.2mm~2.0mm. The progressive addition lens according to claim 1, wherein the distance vision has a diopter of -8.0D to 0D, and the progressive addition lens has a degree of addition of 0D to +3.5D. The astigmatic luminosity of the progressive multifocal lens is -3.5D~0D. The progressive addition lens according to claim 1, wherein a visual width at a reference point of the near vision zone is 10 mm to 35 mm, and a visual width at the reference point of the near vision zone is 10 mm. 35mm. The progressive addition lens of claim 1, wherein the transition zone of the progressive addition lens has a channel length of 15 mm to 30 mm, and the transition zone has a narrowest width of 2 mm to 7 mm. A progressive multifocal lens comprising a frame and two progressive multifocal lenses embedded in the frame, each progressive addition lens comprising an inner surface and an outer surface disposed opposite the inner surface, At least one of the inner surface and the outer surface is a free curved surface, the free curved surface includes a near vision zone at a lower portion of the progressive addition lens, a distance vision zone at an upper portion of the progressive addition lens, and a connection to the near vision And a transition zone of the remote viewing zone, the progressive addition lens further comprising an optical center and a geometric center line passing through the optical center and in an up and down direction, the reference point of the near vision zone The distance of the optical center in the direction of the geometric center line is 13 mm to 25 mm, and the distance between the reference point of the distance viewing zone and the optical center in the direction of the geometric center line is 2 mm to 5 mm. The progressive addition lens according to claim 6, wherein a distance between a reference point of the near vision zone and a reference point of the distance vision zone in a direction perpendicular to the geometric center line is 0.2mm~2.0mm. The progressive multifocal lens of claim 6, wherein the distance vision zone has a diopter of -8.0D~0D, and the progressive addition lens has a degree of addition of 0D~+3.5D, The astigmatic luminosity of the progressive multifocal lens is -3.5D~0D. The progressive multifocal lens of claim 6, wherein the visual width of the reference point of the near vision zone is 10 mm to 35 mm, and the visual width of the reference point of the near vision zone is 10 mm. 35mm. The progressive addition lens according to claim 6, wherein the transition zone of the progressive addition lens has a channel length of 15 mm to 30 mm, and the transition zone has a narrowest width of 2 mm to 7 mm.