US-12619105-B2 - Contact lens

US12619105B2US 12619105 B2US12619105 B2US 12619105B2US-12619105-B2

Abstract

A contact lens includes a lens body, an electronic component, and a circuit structure. The lens body includes an optical portion and an annular wearing portion that surrounds the optical portion. The annular wearing portion has a layout region having a C-shape and a lower eyelid region that is arranged between two ends of the layout region. A front surface of the lens body has a viewable surface corresponding in position to the optical portion and a free curved surface that corresponds in position to the annular wearing portion. The viewable surface has a first curvature that is different from a second curvature of the free curved surface, so that a thickness of the annular wearing portion gradually increases in a direction toward the lower eyelid region. The electronic component is embedded in the lower eyelid region. The circuit structure is embedded in the annular wearing portion.

Inventors

Yi-Fang Huang
Shih-Siang Lin

Assignees

PEGAVISION CORPORATION

Dates

Publication Date: 20260505
Application Date: 20230517

Claims (20)

1 . A contact lens, comprising: a lens body including an optical portion and an annular wearing portion that surrounds the optical portion, wherein the annular wearing portion has a layout region being C-shaped and a lower eyelid region that is arranged between two ends of the layout region, and the lens body includes: a rear surface having a predetermined curvature for being worn on an eye; and a front surface arranged opposite to the rear surface, wherein the front surface has a viewable surface corresponding in position to the optical portion and a free curved surface that corresponds in position to the annular wearing portion; an electronic component embedded in the lower eyelid region of the annular wearing portion; and a circuit structure embedded in the annular wearing portion and connected to the electronic component to establish an electrical connection therebetween; wherein, in a cross-section of the lens body through a central axis (L) passing through the electronic component, the viewable surface has a first curvature different from a second curvature of the free curved surface, and a thickness of the annular wearing portion gradually increases in a direction toward the lower eyelid region.
2 . The contact lens according to claim 1 , wherein the circuit structure includes: a carrier having a C-shaped segment embedded in the layout region and a connection segment that is embedded in the lower eyelid region, wherein the connection segment is connected in-between two distal ends of the C-shaped segment, and the carrier has a fixed curvature different from the second curvature; and a circuit formed on the carrier and connected to the electronic component.
3 . The contact lens according to claim 1 , wherein a largest thickness of the annular wearing portion is located at a part of the annular wearing portion corresponding in position to the electronic component, and a smallest thickness of the annular wearing portion is located at a part of the layout region away from the lower eyelid region.
4 . The contact lens according to claim 1 , wherein the circuit structure in the lower eyelid region is spaced apart from the rear surface by a first distance, and the circuit structure in the layout region is spaced apart from the rear surface by a second distance that is less than the first distance.
5 . The contact lens according to claim 1 , wherein, when the contact lens is worn on the eye, a part of the contact lens having a largest thickness is located inside of a lower eyelid of the eye, and a part of the contact lens having a smallest thickness is located inside of an upper eyelid of the eye.
6 . The contact lens according to claim 1 , wherein the annular wearing portion has a plurality of front positioning slots recessed from the free curved surface toward the circuit structure, and wherein a bottom side of each of the front positioning slots includes a part of the circuit structure so as to enable the part of the circuit structure to be exposed in an external environment.
7 . The contact lens according to claim 6 , wherein a depth of any one of the front positioning slots in the lower eyelid region is greater than a depth of another one of the front positioning slots in the layout region, and a depth of each of the front positioning slots is within a range from 50 μm to 100 μm.
8 . The contact lens according to claim 7 , wherein the bottom side of each of the front positioning slots in the lower eyelid region includes the part of the circuit structure so as to enable the part of the circuit structure to be exposed in the external environment.
9 . The contact lens according to claim 6 , wherein at least one of the front positioning slots has: a first tread surface including the part of the circuit structure exposed in the external environment; a first riser surface connected in-between the free curved surface and the first tread surface; a second tread surface spaced apart from the free curved surface by a distance that is greater than a distance between the first tread surface and the free curved surface; and a second riser surface connected in-between the first tread surface and the second tread surface and arranged at one side of the circuit structure or one side of the electronic component.
10 . The contact lens according to claim 9 , wherein the circuit structure includes a carrier and a circuit that is formed on the carrier and that is entirely embedded in the lens body.
11 . The contact lens according to claim 1 , wherein the circuit structure has a plurality of thru-holes filled with the lens body, and the annular wearing portion has a front positioning slot recessed from the free curved surface toward the circuit structure, and wherein the front positioning slot is arranged across the thru-holes so as to enable a part of each of the thru-holes to be exposed in the external environment.
12 . The contact lens according to claim 11 , wherein the front positioning slot has: a first tread surface including the part of the circuit structure exposed in the external environment; and a second tread surface spaced apart from the free curved surface by a distance that is greater than a distance between the first tread surface and the free curved surface; wherein a position of a part of each of the thru-holes corresponds to a position between the first tread and the second tread of the front positioning slot.
13 . The contact lens according to claim 12 , wherein, in a top view of the contact lens, the front positioning slot extends along a radial direction of the lens body and across the circuit structure.
14 . The contact lens according to claim 1 , wherein the positioning slots further includes a plurality of rear positioning slots recessed in the rear surface toward the circuit structure, and a bottom side of each of the rear positioning slots includes a part of the circuit structure so as to enable the part of the circuit structure to be exposed in an external environment.
15 . The contact lens according to claim 14 , wherein, a depth of each of the rear positioning slots is within a range from 50 μm to 100 μm, and wherein, in a top view of the contact lens, at least one of the rear positioning slots extends along a radial direction of the lens body and across the circuit structure.
16 . The contact lens according to claim 1 , wherein the circuit structure includes: a carrier having a C-shaped segment embedded in the layout region and a connection segment that is embedded in the lower eyelid region, wherein the connection segment is connected in-between two distal ends of the C-shaped segment; and a circuit formed on the carrier and connected to the electronic component, wherein the circuit has at least one enclosed loop; wherein the C-shaped segment has at least one thru-hole that is arranged in the at least one enclosed loop and that is fully filled with the lens body.
17 . The contact lens according to claim 16 , wherein the at least one thru-hole is curved and has a width that gradually increases from two ends thereof toward a center thereof, wherein the at least one thru-hole has an inner edge and an outer edge, and two ends of the inner edge are respectively connected to two ends of the outer edge so as to form the two ends of the at least one thru-hole, and wherein the optical portion defines a central axis, and a center of the inner edge and a center of the outer edge are respectively located on two different flat planes perpendicular to the central axis.
18 . The contact lens according to claim 16 , wherein the optical portion defines a central axis, and wherein, in a top view of the contact lens, the central axis defines an origin point, the contact lens is sequentially divided into a first quadrant, a second quadrant, a third quadrant, and a fourth quadrant along a counterclockwise direction with respect to the origin point, the lower eyelid region is arranged in the third quadrant and the fourth quadrant, four parts of the at least one thru-hole are respectively arranged in the first quadrant, the second quadrant, the third quadrant, and the fourth quadrant, and an area of any one of the four parts of the at least one thru-hole is 50% to 150% of an area of another one of the four parts of the at least one thru-hole.
19 . The contact lens according to claim 1 , wherein the optical portion defines a central axis, and wherein, in a top view of the contact lens, the central axis defines an origin point, a central angle of the lower eyelid region with respect to the origin point is within a range from 30 degrees to 180 degrees.
20 . A contact lens, comprising: a lens body including an optical portion and an annular wearing portion that surrounds the optical portion, wherein the annular wearing portion has a layout region being C-shaped and a lower eyelid region that is arranged between two ends of the layout region, and the lens body includes: a rear surface having a predetermined curvature for being worn on an eye; and a front surface arranged opposite to the rear surface, wherein the front surface has a viewable surface corresponding in position to the optical portion and a free curved surface that corresponds in position to the annular wearing portion; an electronic component embedded in the annular wearing portion, wherein, in a cross-section of the lens body through a central axis (L) passing through the electronic component, the viewable surface has a first curvature being different from a second curvature of the free curved surface, and a thickness of the annular wearing portion gradually increases in a direction toward the electronic component; and a circuit structure embedded in the annular wearing portion and connected to the electronic component to establish an electrical connection therebetween.

Description

CROSS-REFERENCE TO RELATED PATENT APPLICATION This application claims the benefit of priority to the U.S. Provisional Patent Application Ser. No. 63/351,432 filed on Jun. 12, 2022, which application is incorporated herein by reference in its entirety. Some references, which may include patents, patent applications and various publications, may be cited and discussed in the description of this disclosure. The citation and/or discussion of such references is provided merely to clarify the description of the present disclosure and is not an admission that any such reference is “prior art” to the disclosure described herein. All references cited and discussed in this specification are incorporated herein by reference in their entireties and to the same extent as if each reference was individually incorporated by reference. FIELD OF THE DISCLOSURE The present disclosure relates to a contact lens, and more particularly to a smart contact lens. BACKGROUND OF THE DISCLOSURE A conventional smart contact lens is designed with a uniform thickness, and since the conventional smart contact lens needs to have at least one electronic component embedded therein, a thickness of the entire conventional smart contact lens is increased. However, this increased thickness can cause the conventional smart contact lens to have insufficient oxygen permeability. SUMMARY OF THE DISCLOSURE In response to the above-referenced technical inadequacies, the present disclosure provides a contact lens to effectively improve on the issues associated with conventional smart contact lenses. In order to solve the above-mentioned problems, one of the technical aspects adopted by the present disclosure is to provide a contact lens, which includes a lens body, an electronic component, and a circuit structure. The lens body includes an optical portion and an annular wearing portion that surrounds the optical portion. The annular wearing portion has a layout region being C-shaped and a lower eyelid region that is arranged between two ends of the layout region, and the lens body includes a rear surface and a front surface. The rear surface has a predetermined curvature for being worn on an eye. The front surface is arranged opposite to the rear surface. The front surface has a viewable surface corresponding in position to the optical portion and a free curved surface that corresponds in position to the annular wearing portion. The viewable surface has a first curvature being different from a second curvature of the free curved surface, and a thickness of the annular wearing portion gradually increases in a direction toward the lower eyelid region. The electronic component is embedded in the lower eyelid region of the annular wearing portion. The circuit structure is embedded in the annular wearing portion and is connected to the electronic component to establish an electrical connection therebetween. In order to solve the above-mentioned problems, another one of the technical aspects adopted by the present disclosure is to provide a contact lens, which includes a lens body, an electronic component, and a circuit structure. The lens body includes an optical portion and an annular wearing portion that surrounds the optical portion. The annular wearing portion has a layout region being C-shaped and a lower eyelid region that is arranged between two ends of the layout region, and the lens body includes a rear surface and a front surface. The rear surface has a predetermined curvature for being worn on an eye. The front surface is arranged opposite to the rear surface. The front surface has a viewable surface corresponding in position to the optical portion and a free curved surface that corresponds in position to the annular wearing portion. The electronic component is embedded in the annular wearing portion. The viewable surface has a first curvature being different from a second curvature of the free curved surface, and a thickness of the annular wearing portion gradually increases in a direction toward the electronic component. The circuit structure is embedded in the annular wearing portion and is connected to the electronic component to establish an electrical connection therebetween. Therefore, the contact lens of the present disclosure is provided with the free curved surface arranged on the front surface of the lens body, so that a thickness of the layout region does not need to be based completely on (or be equal to) a thickness of the lower eyelid region (e.g., the thickness of the annular wearing portion gradually increases in a direction toward the lower eyelid region), such as to enable the layout region to have a smaller thickness. Accordingly, an oxygen permeability of the layout region can be effectively increased, and the foreign body sensation of the contact lens can be reduced (or improved). These and other aspects of the present disclosure will become apparent from the following description of the embodiment taken in conjunction with t