TWI842417B - Contact Lenses - Google Patents

Abstract

The present invention provides a contact lens, comprising a front curved surface and a concave curved surface. The contact lens has a central optical zone in the center and a peripheral zone surrounding the central optical zone. The peripheral zone has a periphery on the outside. The peripheral zones on both sides of the front curved surface each have a thickened zone. The thickened zone has a top surface, an upward inclined surface, a downward inclined surface, and an outer side surface. The top surface has an inner side edge and an outer side edge. The outer side edge and the periphery form the outer side surface. The thickened zone is arranged along the inner side edge of the peripheral zone. The peripheral area is set up, the thickness of the thickened area gradually increases from the inner side to the outer side, and gradually decreases from the outer side to the periphery. The upward inclined surface is adjacent to the top surface and the outer side surface, and its thickness gradually decreases from the top surface and the outer side surface in the counterclockwise direction of the peripheral area. The downward inclined surface is adjacent to the top surface and the outer side surface, and its thickness gradually decreases from the top surface and the outer side surface in the clockwise direction of the peripheral area. The shape and structure of the thickened area make the contact lens wearable stable and comfortable.

Description

Contact lenses

The present invention relates to a contact lens, in particular to a contact lens with dynamic stability.

It is known that correction of certain optical defects can be achieved by adding aspheric correction features (such as cylindrical, bifocal or multifocal features) to contact lenses. There is a problem with using contact lenses with these features because the contact lens must be oriented at a certain angle relative to the eye to be effective, especially the astigmatic optics. However, due to blinking and the movement of the eyelid and tear fluid, the contact lens will rotate on the eye.

Contact lenses designed to maintain their angular orientation are typically divided into two categories, one of which uses static stabilization to maintain the orientation of the contact lens. Examples of static stabilization methods include prismatic balancing, which thickens the lower contact lens edge to support the contact lens on the lower eyelid, forms depressions or elevations on the contact lens surface, and cuts the contact lens edge. The disadvantage of this method is that it uses gravity to maintain orientation. If the head is tilted, the orientation cannot be maintained, so this method is rarely used.

Another type is dynamic stabilization contact lenses, which use the movement of the eyelid to maintain the orientation of the contact lenses. The dynamic stabilization method includes reducing the thickness of the outer surface of the contact lens in two symmetrical regions, thickening the two outer regions at the horizontal central axis, and thinning the top and bottom regions of the contact lens. Although various manufacturers have proposed various solutions, there is still room for improvement in dynamic stability and comfort.

Therefore, the present invention provides a dynamically stable contact lens, which can increase the fixation of the contact lens, making it less likely to shift or fall off during blinking or exercise, and is more convenient and comfortable to wear.

The present invention provides a contact lens, comprising a front curved surface and a concave curved surface. The center of the contact lens has a central optical zone and a peripheral zone surrounding the central optical zone. The peripheral zone has a periphery on the outside. The peripheral zones on both sides of the front curved surface each have a thickened zone. The thickened zone has a top surface, an upward inclined surface, a downward inclined surface, and an outer side surface. The top surface has an inner side edge and an outer side edge. The outer side edge is in contact with the inner side edge. The periphery forms the outer side surface, the thickened area is set along the peripheral area, the thickness of the thickened area gradually increases from the inner side to the outer side, and gradually decreases from the outer side to the periphery, the upward inclined surface is adjacent to the top surface and the outer side surface, and its thickness gradually decreases from the top surface and the outer side surface in the counterclockwise direction of the peripheral area, and the downward inclined surface is adjacent to the top surface and the outer side surface, and its thickness gradually decreases from the top surface and the outer side surface in the clockwise direction of the peripheral area.

In one embodiment, the inner side and the outer side of the thickened area are parallel to the periphery.

In one embodiment, the height of the upward slope gradually slopes upward from the top surface and the outer side surface and disappears in the peripheral area.

In one embodiment, the height of the downwardly inclined surface gradually slopes downward from the top surface and the outer side surface and then disappears in the peripheral area.

In one embodiment, there is an upper adjacent line at the junction between the top surface and the upward inclined surface. When viewed from above, the upper adjacent line is in the radial direction of the lens, and the extension line of the upper adjacent line passes through the center of the lens.

In one embodiment, there is a lower adjacent line at the junction between the top surface and the downward inclined surface. When viewed from above, the lower adjacent line is in the radial direction of the lens, and the extension line of the lower adjacent line passes through the center of the lens.

In one embodiment, the upper edge of the upward slope has an upward convex arc line, which starts from the inner side and ends at the periphery.

In one embodiment, the lower edge of the downward slope has a convex arc line, which starts from the inner side and ends at the periphery.

The contact lenses of the present invention are provided with thickened areas on both sides. The shape and structure of the thickened areas can be used to stably maintain the position of the contact lenses on the eyeball, improve the fixation of the contact lenses on the eyeball, and reduce the possibility of displacement of the contact lenses. The contact lenses of the present invention are designed according to ergonomics. The shape of the thickened areas is a streamlined arc, which is not only highly stable, but also more comfortable to wear.

50: Contact lenses

55: Front curved surface

56: Concave arc surface

51: Central Optical District

52: Peripheral area

521: Periphery

60: Thickening area

61: Top

62: Upward slope

63: Downward slope

64: Outer side

611:Inside side

612: Outer side

64: Outer side

621: Upward convex arc

622: Upper wiring

57: Lens center

58: Extension line

631: Downward convex arc

632: Lower connection line

59: Extension line

70: Positioning groove

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Figure 1 is a top view of the present invention.

Figure 2 is a side view of the present invention.

Figure 3 is one of the three-dimensional diagrams of the present invention.

Figure 4 is the second three-dimensional diagram of the present invention.

Figure 5 is a three-dimensional schematic diagram of the 12-12 section line of Figure 1 of the present invention.

In order to enable the examiner to have a further understanding of the characteristics and features of the present invention, the following preferred embodiments are listed and illustrated with drawings as follows: Referring to Figures 1 to 5, the present invention provides a contact lens 50, including a front arc surface 55 and a concave arc surface 56. The center of the contact lens 50 has a central optical zone 51 and a peripheral zone 52 surrounding the central optical zone 51. The central optical zone 51 is used to set various optical designs such as myopia, presbyopia, multifocality and astigmatism. The peripheral zone 52 has a periphery 521 on the outside. The peripheral zones 52 on both sides of the front arc surface 55 each have a thickened zone 60. The thickened zone 60 has a top surface 61, an upward inclined surface 62, a downward inclined surface 63, and an outer surface 64.

In one embodiment, there is an astigmatism optical zone 53 in the central optical zone 51 of the front curved surface 55, and the astigmatism optical zone 53 shows one of the astigmatism axes. In addition, another astigmatism optical zone 54 is shown in the central optical zone 51, and the astigmatism optical zone 54 is represented by a dotted line and an arrow 541 indicates that the astigmatism optical zone 54 can be any astigmatism axis.

In one embodiment, the top surface 61 has an inner side 611 and an outer side 612, the thickened area 60 is set along the peripheral area 52, and the inner side 611 and the outer side 612 are parallel to the peripheral 521. The thickness of the thickened area 60 gradually increases from the inner side 611 to the outer side 612, and gradually decreases from the outer side 612 to the peripheral 521. The outer side surface 64 is formed between the outer side 612 and the peripheral 521, that is, the outer side surface 64 is between the outer side 612 and the peripheral 521, and the thickness of the outer side surface 64 gradually decreases from the inside to the outside to be consistent with the thickness of the peripheral 521.

In one embodiment, the upward inclined surface 62 is adjacent to the top surface 61 and the outer side surface 64, and its thickness gradually decreases from the top surface 61 and the outer side surface 64 in the counterclockwise direction of the peripheral area and disappears in the peripheral area 52, and an upward convex arc line 621 is formed on the upper edge of the upward inclined surface 62, and the upward convex arc line 621 starts from the inner side 611 and ends at the peripheral edge 521. The top surface 61 and the upward inclined surface 62 have an upper connecting line at the adjacent position. 622, from the top view of FIG1, the upper connecting line 622 is in the radial direction of the lens, and the extension line 58 of the upper connecting line 622 passes through the center 57 of the lens. Although the upper connecting line 622 is a line in the figure, the extension line 58 does not exist, so it is represented by an imaginary line. In fact, the top surface 61 and the upward inclined surface 62 can be connected at a smooth arc, forming an upper connecting line 622 with an arc angle in cross section.

In one embodiment, the downwardly inclined surface 63 is adjacent to the top surface 61 and the outer side surface 64, and its thickness gradually decreases from the top surface 61 and the outer side surface 64 in the clockwise direction of the peripheral area and disappears in the peripheral area 52, and a convex arc line 631 is formed at the lower edge of the downwardly inclined surface 63, and the convex arc line 631 starts from the inner side 611 and ends at the peripheral edge 521. There is a lower contact line 632 at the point of contact. From the top view of FIG1 , the lower contact line 632 is in the radial direction of the lens. The extension line 59 of the lower contact line 632 passes through the center 57 of the lens. The extension line 59 does not exist, so it is represented by an imaginary line. In fact, the top surface 61 and the downward inclined surface 63 can be connected at a smooth arc, forming a lower contact line 632 with an arc angle in cross section.

In one embodiment, the cross-section of the upper connecting line 622 and the lower connecting line 632 is an arc angle, and the eyelid is more comfortable when in contact. The shape and structural design of the upper convex arc line 621 and the lower convex arc line 631 allow the eyelid to easily enter the thickened area 60, and the upward inclined surface 62 and the downward inclined surface 63 allow the eyelid to gradually push forward to reduce the presence of the thickened area 60, while allowing the eyelid to have an effect on the thickened area 60. The outer side surfaces 64 of the left and right thickened areas 60 are supported and adapted to the ergonomics of the two sides of the eyes, making the contact lenses more stable and comfortable.

As shown in FIG. 1 , in one embodiment, the thickened area 60 is provided with a positioning groove 70, and the positioning groove 70 is located on the horizontal line between the lens center 57 and the thickened area 60. The user can determine the position of the contact lens 50 by the positioning groove 70, and can wear the contact lens 50 more quickly.

The above is an introduction to the components and features of a contact lens 50 provided by a preferred embodiment of the present invention. Next, its usage features are described as follows: The contact lens 50 of the present invention is provided with a thickened area 60 on both sides. The difference in thickness at different positions of the contact lens itself can be used to stably maintain the position of the contact lens on the eyeball, thereby enhancing the fixation of the contact lens on the eyeball, so that the contact lens will not shift when the user blinks or performs more intense exercises. In addition, the contact lens 50 of the present invention is designed based on ergonomics. The shape of the thickened area 60 is a streamlined arc, which is not only highly stable, but also more comfortable to wear.

50: Contact lenses

51: Central Optical District

52: Peripheral area

521: Periphery

60: Thickening area

61: Top

62: Upward slope

63: Downward slope

64: Outer side

611:Inside side

612: Outer side

621: Upward convex arc

622: Upper wiring

57: Lens center

58: Extension line

631: Downward convex arc

632: Lower connection line

59: Extension line

70: Positioning groove

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Claims (10)

A contact lens comprises a front curved surface and a concave curved surface. The center of the contact lens has a central optical zone and a peripheral zone surrounding the central optical zone. The peripheral zone has a periphery on the outside. The peripheral zones on both sides of the front curved surface each have a thickened zone. The thickened zone has a top surface, an upward inclined surface, a downward inclined surface, and an outer side surface. The top surface has an inner side edge and an outer side edge. The outer side edge and the periphery form the outer side surface. The thickened zone is set along the peripheral zone. The thickness gradually increases from the inner side to the outer side, and gradually decreases from the outer side to the periphery. The upward inclined surface is adjacent to the top surface and the outer side surface. The thickness of the upward inclined surface gradually decreases from the top surface and the outer side surface in the counterclockwise direction of the peripheral area and then disappears in the peripheral area. The edge of the upward inclined surface has an upward convex arc line, which starts from the inner side and ends at the periphery. The downward inclined surface is adjacent to the top surface and the outer side surface. The thickness of the downward inclined surface gradually decreases from the top surface and the outer side surface in the clockwise direction of the peripheral area. The contact lens as described in item 1 of the patent application, wherein the inner side and the outer side of the thickened area are parallel to the periphery. A contact lens comprises a front curved surface and a concave curved surface. The center of the contact lens has a central optical zone and a peripheral zone surrounding the central optical zone. The peripheral zone has a periphery on the outside. The peripheral zones on both sides of the front curved surface each have a thickened zone. The thickened zone has a top surface, an upward inclined surface, a downward inclined surface, and an outer side surface. The top surface has an inner side edge and an outer side edge. The outer side surface is formed between the outer side edge and the periphery. The thickened zone is set along the peripheral zone. The thickness of the thickened zone is The thickness of the upward slope gradually increases from the inner side to the outer side, and gradually decreases from the outer side to the periphery. The upward slope is adjacent to the top surface and the outer side. The thickness of the upward slope gradually decreases from the top surface and the outer side in the counterclockwise direction of the peripheral area. The downward slope is adjacent to the top surface and the outer side. The thickness of the downward slope gradually decreases from the top surface and the outer side in the clockwise direction of the peripheral area and then disappears in the peripheral area. The lower edge of the downward slope has a convex arc line, which starts from the inner side and ends at the periphery. The contact lens as described in item 3 of the patent application, wherein the inner side and the outer side of the thickened area are parallel to the periphery. A contact lens comprises a front curved surface and a concave curved surface. The center of the contact lens has a central optical zone and a peripheral zone surrounding the central optical zone. The peripheral zone has a periphery on the outside. The peripheral zones on both sides of the front curved surface each have a thickened zone. The thickened zone has a top surface, an upward inclined surface, a downward inclined surface, and an outer side surface. The top surface has an inner side edge and an outer side edge. The outer side edge and the periphery form the outer side surface. The thickened zone is set along the peripheral zone. The thickness of the thickened zone increases from the inner side edge to the outer side. The thickness of the upward bevel gradually increases from the top surface to the outer surface, and gradually decreases from the outer side to the periphery. The upward bevel is adjacent to the top surface and the outer side surface, and the thickness of the upward bevel gradually decreases from the top surface and the outer side surface in the counterclockwise direction of the peripheral area. The downward bevel is adjacent to the top surface and the outer side surface, and the thickness of the downward bevel gradually decreases from the top surface and the outer side surface in the clockwise direction of the peripheral area. The top surface and the upward bevel have an upper adjacent line at the adjacent position. From a top view, the upper adjacent line is in the radial direction of the lens, and the extension line of the upper adjacent line passes through the center of the lens. As described in item 5 of the patent application scope, the cross-section of the upper connecting line is an arc angle. The contact lens as described in Item 5 of the patent application, wherein the inner side and the outer side of the thickened area are parallel to the periphery. A contact lens comprises a front curved surface and a concave curved surface. The center of the contact lens has a central optical zone and a peripheral zone surrounding the central optical zone. The peripheral zone has a periphery on the outside. The peripheral zones on both sides of the front curved surface each have a thickened zone. The thickened zone has a top surface, an upward inclined surface, a downward inclined surface, and an outer side surface. The top surface has an inner side edge and an outer side edge. The outer side edge and the periphery form the outer side surface. The thickened zone is set along the peripheral zone. The thickness of the thickened zone increases from the inner side edge to the outer side. The thickness of the upward bevel gradually increases from the top surface to the outer surface, and gradually decreases from the outer side to the periphery. The upward bevel is adjacent to the top surface and the outer side surface, and the thickness of the upward bevel gradually decreases from the top surface and the outer side surface in the counterclockwise direction of the peripheral area. The downward bevel is adjacent to the top surface and the outer side surface, and the thickness of the downward bevel gradually decreases from the top surface and the outer side surface in the clockwise direction of the peripheral area. The top surface and the downward bevel have a lower adjacent line at the adjacent point. From a top view, the lower adjacent line is in the radial direction of the lens, and the extension line of the lower adjacent line passes through the center of the lens. As described in item 8 of the patent application scope, the cross-section of the lower connecting line is an arc angle. The contact lens as described in Item 8 of the patent application, wherein the inner side and the outer side of the thickened area are parallel to the periphery.

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