Eye lenses

Abstract

To provide an ophthalmic lens with a multifocal refractive power design, allowing the arrangement of refractive powers to be arbitrarily changed according to the requirements of vision correction, thereby reducing visual fatigue and achieving a clearer and more comfortable wearing experience. [Solution] In an ophthalmic lens comprising a central optical region, a first outer ring optical region surrounding the central optical region, a second outer ring optical region surrounding the first outer ring optical region, and a third outer ring optical region surrounding the second outer ring optical region, two first refractive correction regions, one second refractive correction region, and one third refractive correction region are defined, and these two first refractive correction regions, the second refractive correction region, and the third refractive correction region can be arbitrarily arranged in any of the central optical region, the first outer ring optical region, the second outer ring optical region, and the third outer ring optical region, thereby realizing a diverse array of refractive powers for the ophthalmic lens.

Description

Technical Field

[0001] The present invention relates to an ophthalmic lens, and particularly to a multifocal ophthalmic lens. Background Art

[0002] In recent years, with the popularization of 3C products, the incidence of myopia among children and adolescents tends to occur at younger ages, and as a result, the proportion of patients with high myopia has increased significantly. Vision problems are not limited to myopia and hyperopia, and are often accompanied by astigmatism. After light passes through the cornea, a clear image is formed if the light is correctly focused on the retina. However, when the light cannot be focused at a single focal point and instead forms multiple focal points, astigmatism occurs, which causes problems such as image distortion, distortion and blurring when viewing objects both far and near, and seriously affects vision quality.

[0003] Conventionally, the main method for correcting vision deviation is wearing an ophthalmic lens, such as a contact lens. Most conventional refractive power designs for ophthalmic lenses with multifocal correction function adopt a method of gradually increasing the refractive power from the central region to the peripheral region. Such a refractive power variation pattern tends to cause discomfort to the wearer, which is particularly unbearable when used for a long time, and rather reduces the vision control effect. Summary of the Invention Problem to be Solved by the Invention

[0004] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an ophthalmic lens that has a multifocal refractive power design, can arbitrarily change the arrangement of refractive powers according to the requirements of vision correction, reduces visual fatigue, and achieves a clearer and more comfortable wearing effect. Means for Solving the Problem

[0005] To achieve the above objective, the ophthalmic lens according to the present invention comprises a central optical region, a first outer ring optical region surrounding the central optical region, a second outer ring optical region surrounding the first outer ring optical region, and a third outer ring optical region surrounding the second outer ring optical region, wherein the ophthalmic lens defines two first refractive correction regions, one second refractive correction region, and one third refractive correction region, and these two first refractive correction regions, the second refractive correction region, and the third refractive correction region are arbitrarily arranged in any of the central optical region, the first outer ring optical region, the second outer ring optical region, and the third outer ring optical region, and the ophthalmic lens has a refractive power distribution curve, the first refractive correction region exhibits a horizontal straight line in the refractive power distribution curve, the second refractive correction region and the third refractive correction region each exhibit a wave-like shape with at least one wave crest in the refractive power distribution curve, and further satisfies the following range. 3.5mm ≤ Z1 + Z2 + Z3 + Z4 ≤ 5.0mm (Here, Z1 is the distance the central optical region extends from the center point to the boundary of the central optical region, Z2 is the distance the first outer ring optical region extends from the boundary of the central optical region to the boundary of the first outer ring optical region, Z3 is the distance the second outer ring optical region extends from the boundary of the first outer ring optical region to the boundary of the second outer ring optical region, and Z4 is the distance the third outer ring optical region extends from the boundary of the second outer ring optical region to the boundary of the third outer ring optical region.)

[0006] According to the present invention, the design of multifocal refractive powers provides the effect of reducing visual fatigue for the wearer, resulting in a clearer and more comfortable visual experience. Furthermore, in the central optical region, the first outer ring optical region, the second outer ring optical region, and the third outer ring optical region, two first refractive correction regions, the second refractive correction region, and the third refractive correction region can be arbitrarily arranged, and the refractive power of each refractive correction region can be individually assigned, thus allowing for diversity in the refractive power arrangement of the ophthalmic lens. [Brief explanation of the drawing]

[0007] The aforementioned and other features of the present invention will be described in detail with reference to the accompanying drawings. [Figure 1A] This is a schematic diagram of the structure of an ophthalmic lens according to a preferred embodiment of the first embodiment of the present invention. [Figure 1B] This is a refractive power distribution curve diagram of an ophthalmic lens according to a first preferred embodiment of the present invention. [Figure 2] This is a refractive power distribution curve diagram of an ophthalmic lens according to a second preferred embodiment of the present invention. [Figure 3] This is a refractive power distribution curve diagram of an ophthalmic lens according to a third preferred embodiment of the present invention. [Figure 4] This is a refractive power distribution curve diagram of an ophthalmic lens according to a fourth preferred embodiment of the present invention. [Figure 5] This is a refractive power distribution curve diagram of an ophthalmic lens according to a fifth preferred embodiment of the present invention. [Modes for carrying out the invention]

[0008] To more clearly explain the present invention, preferred embodiments are given below and described in detail with reference to the drawings. As shown in Figures 1A and 1B, the ophthalmic lens 100 according to the first preferred embodiment of the present invention comprises a central optical region 10, a first outer ring optical region 20, a second outer ring optical region 30, and a third outer ring optical region 40. In this embodiment, the ophthalmic lens 100 is described as a contact lens, but is not limited thereto.

[0009] The central optical region 10 has a center point O, the first outer ring optical region 20 surrounds the central optical region 10, the second outer ring optical region 30 surrounds the first outer ring optical region 20, and the third outer ring optical region 40 surrounds the second outer ring optical region 30. In this embodiment, the first outer ring optical region 20, the second outer ring optical region 30, and the third outer ring optical region 40 are each arranged concentrically with respect to the center point O.

[0010] The ophthalmic lens 100 has two first refractive correction regions A1, one second refractive correction region B1, and one third refractive correction region C1 defined, and these two first refractive correction regions A1, the second refractive correction region B1, and the third refractive correction region C1 can be arbitrarily arranged in any of the central optical region 10, the first outer rim optical region 20, the second outer rim optical region 30, and the third outer rim optical region 40. In other words, the ophthalmic lens 100 can arbitrarily arrange the two first refractive correction regions A1, the second refractive correction region B1, and the third refractive correction region C1 within the central optical region 10, the first outer rim optical region 20, the second outer rim optical region 30, and the third outer rim optical region 40, according to the requirements for visual acuity correction. These refractive correction regions A1, B1, and C1 do not necessarily have to be arranged in the order of the central optical region 10, the first outer ring optical region 20, the second outer ring optical region 30, and the third outer ring optical region 40.

[0011] In one preferred embodiment, the two first refractive correction regions are each located in any two of the central optical region, the first outer ring optical region, the second outer ring optical region, and the third outer ring optical region, with the second refractive correction region and / or the third refractive correction region located between these two first refractive correction regions. In another preferred embodiment, the two first refractive correction regions are located adjacent to each other, each located in any two of the central optical region, the first outer ring optical region, the second outer ring optical region, and the third outer ring optical region, with the second or third refractive correction region located on one side of these first refractive correction regions. In yet another preferred embodiment, the two first refractive correction regions are located adjacent to the first and second outer ring optical regions, with the second and third refractive correction regions located in the central optical region and the third outer ring optical region, respectively, and the two first refractive correction regions are located between the second and third refractive correction regions. For example, the two first refractive correction regions A1, the second refractive correction region B1, and the third refractive correction region C1 within the ophthalmic lens 100 can be arbitrarily arranged in the central optical region 10, the first outer ring optical region 20, the second outer ring optical region 30, and the third outer ring optical region 40, as shown in Table 1 below. [Table 1]

[0012] As shown in Figure 1B, in the first embodiment, in the refractive power distribution curve diagram of the ophthalmic lens 100, two first refractive correction regions A1 are arranged adjacent to the central optical region 10 and the first outer ring optical region 20, the second refractive correction region B1 is located in the second outer ring optical region 30, and the third refractive correction region C1 is located in the third outer ring optical region 40. Here, each first refractive correction region A1 exhibits a horizontal straight line in the refractive power distribution curve, the second refractive correction region B1 and the third refractive correction region C1 each exhibit a continuously changing wave shape in the refractive power distribution curve, and the second refractive correction region B1 and the third refractive correction region C1 each have multiple peaks. Specifically, the second refractive correction region B1 has multiple first peaks S1 and multiple first troughs T1 in its refractive frequency distribution curve, and the third refractive correction region C1 has multiple second peaks S2 and multiple second troughs T2 in its refractive frequency distribution curve. However, in other embodiments, the second refractive correction region B1 and the third refractive correction region C1 only need to have at least one peak in their refractive frequency distribution curves.

[0013] In order to ensure that the ophthalmic lens 100 has a good visual acuity correction effect, in the first embodiment, the ophthalmic lens 100 satisfies the following condition: (1) 3.5mm≦Z1+Z2+Z3+Z4≦5.0mm; (2) 0.25mm ≤ Z1 ≤ 1.4mm; (3) 0.25mm ≤ Z2 ≤ 1.4mm; (4) 0.25mm ≤ Z3 ≤ 1.4mm; (5) 0.25mm ≤ Z4 ≤ 1.4mm; (6) -1.00D≦PPSD≦1.00D; (7) -3.00D≦PPSD-PPS1≦3.00D; (8) -4.00D≦PPS1-PPS2≦4.00D; (9) 1.00D≦│PPS1-PPT1│≦4.00D; (10) 1.00D≦│PPS2-PPT2│≦4.00D.

[0014] Here, Z1 is the distance from the center point of the central optical region 10 to the boundary of the central optical region 10, the boundary of the central optical region 10 refers to the intersection of the central optical region 10 and the first outer ring optical region 20, and the center point is the starting point of the refractive power distribution curve. Z2 is the distance that the first outer ring optical region 20 extends from the boundary of the central optical region 10 to the boundary of the first outer ring optical region 20, the boundary of the first outer ring optical region 20 is the intersection of the first outer ring optical region 20 and the second outer ring optical region 30. Z3 is the distance that the second outer ring optical region 30 extends from the boundary of the first outer ring optical region 20 to the boundary of the second outer ring optical region 30, the boundary of the second outer ring optical region 30 is the intersection of the second outer ring optical region 30 and the third outer ring optical region 40. Z4 is the distance from the boundary of the second outer ring optical region 30 to the boundary of the third outer ring optical region 40, where the boundary of the third outer ring optical region 40 is the outer edge of the ophthalmic lens. PPSD is the refractive power of each first refractive correction region A1. PPS1 is the peak refractive power at each first crest S1 in the second refractive correction region B1, and PPT1 is the trough refractive power at each first trough T1 in the second refractive correction region B1. Here, the refractive power peak value PPS1 of the second refractive correction region B1 is based on the highest first crest S1, and the refractive power trough value PPT1 of the second refractive correction region B1 is based on the lowest first trough T1. PPS2 is the peak value of refractive error at each second wave peak S2 in the third refractive correction region C1, and PPT2 is the trough value of refractive error at each second wave trough T2 in the third refractive correction region C1. Here, the refractive error peak value PPS2 in the third refractive correction region C1 is based on the highest second wave peak S2, and the refractive error trough value PPT2 in the third refractive correction region C1 is based on the lowest second wave trough T2.

[0015] As can be seen from the refractive power distribution curve diagram in FIG. 1B, in the first embodiment, the distance that the central optical region 10 extends from the center point to the boundary of the central optical region 10 is Z1=1.0 mm, the distance that the first outer annular optical region 20 extends from the boundary of the central optical region 10 to the boundary of the first outer annular optical region 20 is Z2=1.0 mm, the distance that the second outer annular optical region 30 extends from the boundary of the first outer annular optical region 20 to the boundary of the second outer annular optical region 30 is Z3=1.0 mm, and the distance that the third outer annular optical region 40 extends from the boundary of the second outer annular optical region 30 to the boundary of the third outer annular optical region 40 is Z4=1.0 mm. In the refractive power distribution curve, the total extension from the center point of the central optical region 10 to the boundary of the third outer annular optical region 40 is Z1+Z2+Z3+Z4=4.0 mm. The refractive power PPSD of each first refractive correction region A1 is -1.00D, the refractive power peak value PPS1 of the second refractive correction region B1 is 1.00D, and the refractive power valley value PPT1 of the second refractive correction region B1 is 0.00D. The refractive power peak value PPS2 of the third refractive correction region C1 is 2.00D, and the refractive power valley value PPT2 of the third refractive correction region C1 is 1.00D.

[0016] Therefore, based on the detailed numerical values of the above refractive power distribution curve, the conditional expression of the ophthalmic lens 100 described above becomes the following specific numerical values in the first embodiment: (1) Z1+Z2+Z3+Z4=4.0mm; (2) Z1=1.0mm; (3) Z2=1.0mm; (4) Z3=1.0mm; (5) Z4=1.0mm; (6) PPSD=-1.00D; (7) PPSD-PPS1=-2.00D; (8) PPS1-PPS2=-1.00D; (9) │PPS1-PPT1│=1.00D; (10) │PPS2-PPT2│=1.00D.

[0017] As described above, the first embodiment satisfies all of the conditions (1) to (10) set for the ophthalmic lens 100 described above. Furthermore, in the ophthalmic lens 100 in the first embodiment, the refractive power arrangement of the two first refractive correction regions A1, second refractive correction region B1, and third refractive correction region C1 is a power change in which the refractive power increases sequentially in the first outer ring optical region 20, second outer ring optical region 30, and third outer ring optical region 40. Here, the difference between the refractive power peak value and refractive power trough value of the second refractive correction region B1 |PPS1-PPT1| and the difference between the refractive power peak value and refractive power trough value of the third refractive correction region C1 |PPS2-PPT2| are both the same. Thus, the ophthalmic lens 100, through its multifocal refractive power design, reduces the refractive power difference between any two adjacent regions among the central optical region 10, the first outer ring optical region 20, the second outer ring optical region 30, and the third outer ring optical region 40, thereby reducing visual fatigue for the wearer and providing a clearer and more comfortable experience when wearing the ophthalmic lens 100.

[0018] As shown in Figure 2, the ophthalmic lens 200 according to a second preferred embodiment of the present invention includes a central optical region 10, a first outer ring optical region 20, a second outer ring optical region 30, and a third outer ring optical region 40. The configuration of the central optical region 10, the first outer ring optical region 20, the second outer ring optical region 30, and the third outer ring optical region 40 in the second embodiment is basically the same as described above for the first embodiment, that is, the first outer ring optical region 20, the second outer ring optical region 30, and the third outer ring optical region 40 are structured to surround the central optical region 10 in order.

[0019] The ophthalmic lens 200 defines two first refractive correction regions A2, one second refractive correction region B2, and one third refractive correction region C2, which can be arbitrarily positioned in any of the central optical region 10, the first outer ring optical region 20, the second outer ring optical region 30, and the third outer ring optical region 40. As shown in Figure 2, in the second embodiment, in the refractive power distribution curve diagram of the ophthalmic lens 200, the two first refractive correction regions A2 are located in the central optical region 10 and the second outer ring optical region 30, respectively, the second refractive correction region B2 is located in the first outer ring optical region 20, and the third refractive correction region C2 is located in the third outer ring optical region 40. Here, each first refractive correction region A2 exhibits a horizontal straight line in the refractive frequency distribution curve, while the second refractive correction region B2 and the third refractive correction region C2 exhibit a continuously changing wave shape with multiple peaks in the refractive frequency distribution curve. Specifically, the second refractive correction region B2 has multiple first peaks S1 and multiple first troughs T1 in the refractive frequency distribution curve, and the third refractive correction region C2 has multiple second peaks S2 and multiple second troughs T2 in the refractive frequency distribution curve. However, in other embodiments, the second refractive correction region B2 and the third refractive correction region C2 only need to have at least one peak.

[0020] In order to ensure that the ophthalmic lens 200 has a good visual acuity correction effect, in the second embodiment, the ophthalmic lens 200 satisfies the following condition: (1) 3.5mm≦Z1+Z2+Z3+Z4≦5.0mm; (2) 0.25mm ≤ Z1 ≤ 1.4mm; (3) 0.25mm ≤ Z2 ≤ 1.4mm; (4) 0.25mm ≤ Z3 ≤ 1.4mm; (5) 0.25mm ≤ Z4 ≤ 1.4mm; (6) -1.00D≦PPSD≦1.00D; (7) -3.00D≦PPSD-PPS1≦3.00D; (8) -4.00D≦PPS1-PPS2≦4.00D; (9) 1.00D≦│PPS1-PPT1│≦4.00D; (10) 1.00D≦│PPS2-PPT2│≦4.00D.

[0021] Here, Z1 is the distance from the center point of the central optical region 10 to the boundary of the central optical region 10, and Z2 is the distance that the first outer ring optical region 20 extends from the boundary of the central optical region 10 to the boundary of the first outer ring optical region 20. Z3 is the distance that the second outer ring optical region 30 extends from the boundary of the first outer ring optical region 20 to the boundary of the second outer ring optical region 30, and Z4 is the distance that the third outer ring optical region 40 extends from the boundary of the second outer ring optical region 30 to the boundary of the third outer ring optical region 40. PPSD is the refractive index of each first refractive correction region A2, PPS1 is the refractive index peak value at each first wave crest S1 in the second refractive correction region B2, and PPT1 is the refractive index trough value at each first wave trough T1 in the second refractive correction region B2. PPS2 is the refractive peak value at each second wave crest S2 in the third refractive correction region C2, and PPT2 is the refractive trough value at each second wave trough T2 in the third refractive correction region C2.

[0022] As can be seen from the refractive power distribution curve in Figure 2, in the second embodiment, the distance from the center point of the central optical region 10 to the boundary of the central optical region 10 is Z1 = 1.0 mm, the distance that the first outer ring optical region 20 extends from the boundary of the central optical region 10 to the boundary of the first outer ring optical region 20 is Z2 = 1.0 mm, the distance that the second outer ring optical region 30 extends from the boundary of the first outer ring optical region 20 to the boundary of the second outer ring optical region 30 is Z3 = 1.0 mm, and the distance that the third outer ring optical region 40 extends from the boundary of the second outer ring optical region 30 to the boundary of the third outer ring optical region 40 is Z4 = 1.0 mm. In the refractive power distribution curve, the total length from the center point of the central optical region 10 to the boundary of the third outer ring optical region 40 is Z1 + Z2 + Z3 + Z4 = 4.0 mm. The refractive error PPSD for the first refractive correction region A2 is -1.00D, the refractive error peak value PPS1 for the second refractive correction region B2 is 1.00D, the refractive error trough value PPT1 for the second refractive correction region B2 is 0.00D, the refractive error peak value PPS2 for the third refractive correction region C2 is 2.00D, and the refractive error trough value PPT2 for the third refractive correction region C2 is 1.00D.

[0023] Therefore, based on the detailed numerical values ​​of the refractive power distribution curve described above, the conditional formula for the ophthalmic lens 200 described above becomes the following specific numerical values ​​in the second embodiment: (1) Z1+Z2+Z3+Z4=4.0mm; (2) Z1 = 1.0 mm; (3) Z2 = 1.0 mm; (4) Z3 = 1.0 mm; (5) Z4 = 1.0 mm; (6) PPSD = -1.00D; (7) PPSD - PPS1 = -2.00D; (8) PPS1 - PPS2 = -1.00D; (9) │PPS1-PPT1│=1.00D; (10) │PPS2-PPT2│=1.00D.

[0024] As described above, the second embodiment satisfies all of the conditions (1) to (10) set for the ophthalmic lens 200 described above. Furthermore, in the ophthalmic lens 200 of the second embodiment, the second refractive correction region B2 is located between the two first refractive correction regions A2, and the third refractive correction region C2 is located to the side of one of the first refractive correction regions A2. In addition, the refractive power of the second refractive correction region B2 and the third refractive correction region C2 are higher than that of each first refractive correction region A2. Here, the difference between the refractive power peak value and trough value of the second refractive correction region B2 |PPS1-PPT1| and the difference between the refractive power peak value and trough value of the third refractive correction region C2 |PPS2-PPT2| are both the same. Thus, the ophthalmic lens 200, through its multifocal refractive power design, reduces the refractive power difference between any two adjacent regions among the central optical region 10, the first outer ring optical region 20, the second outer ring optical region 30, and the third outer ring optical region 40, thereby reducing visual fatigue for the wearer and providing a clearer and more comfortable visual effect when wearing the ophthalmic lens 200.

[0025] As shown in Figure 3, the ophthalmic lens 300 according to a third preferred embodiment of the present invention includes a central optical region 10, a first outer ring optical region 20, a second outer ring optical region 30, and a third outer ring optical region 40. The configuration of the central optical region 10, the first outer ring optical region 20, the second outer ring optical region 30, and the third outer ring optical region 40 in the third embodiment is basically the same as described above for the first embodiment, that is, the first outer ring optical region 20, the second outer ring optical region 30, and the third outer ring optical region 40 are structured to surround the central optical region 10 in order.

[0026] The ophthalmic lens 300 defines two first refractive correction regions A3, one second refractive correction region B3, and one third refractive correction region C3, which can be arbitrarily positioned in any of the central optical region 10, the first outer ring optical region 20, the second outer ring optical region 30, and the third outer ring optical region 40. As shown in Figure 3, in the third embodiment, in the refractive power distribution curve of the ophthalmic lens 300, the two first refractive correction regions A3 are located in the central optical region 10 and the third outer ring optical region 40, respectively, the second refractive correction region B3 is located in the first outer ring optical region 20, and the third refractive correction region C3 is located in the second outer ring optical region 30. Here, each first refractive correction region A3 exhibits a horizontal straight line in the refractive frequency distribution curve, while the second refractive correction region B3 and the third refractive correction region C3 exhibit a continuously changing wave shape with multiple peaks in the refractive frequency distribution curve. Specifically, the second refractive correction region B3 has multiple first peaks S1 and multiple first troughs T1 in the refractive frequency distribution curve, and the third refractive correction region C3 has multiple second peaks S2 and multiple second troughs T2 in the refractive frequency distribution curve. However, in other embodiments, the second refractive correction region B3 and the third refractive correction region C3 only need to have at least one peak.

[0027] In order to ensure that the ophthalmic lens 300 has a good visual acuity correction effect, in the third embodiment, the ophthalmic lens 300 satisfies the following condition: (1) 3.5mm≦Z1+Z2+Z3+Z4≦5.0mm; (2) 0.25mm ≤ Z1 ≤ 1.4mm; (3) 0.25mm ≤ Z2 ≤ 1.4mm; (4) 0.25mm ≤ Z3 ≤ 1.4mm; (5) 0.25mm ≤ Z4 ≤ 1.4mm; (6) -1.00D≦PPSD≦1.00D; (7) -3.00D≦PPSD-PPS1≦3.00D; (8) -4.00D≦PPS1-PPS2≦4.00D; (9) 1.00D≦│PPS1-PPT1│≦4.00D; (10) 1.00D≦│PPS2-PPT2│≦4.00D.

[0028] Here, Z1 is the distance from the center point of the central optical region 10 to the boundary of the central optical region 10, and Z2 is the distance that the first outer ring optical region 20 extends from the boundary of the central optical region 10 to the boundary of the first outer ring optical region 20. Z3 is the distance that the second outer ring optical region 30 extends from the boundary of the first outer ring optical region 20 to the boundary of the second outer ring optical region 30, and Z4 is the distance that the third outer ring optical region 40 extends from the boundary of the second outer ring optical region 30 to the boundary of the third outer ring optical region 40. PPSD is the refractive index of each first refractive correction region A3, PPS1 is the refractive index peak value at each first wave crest S1 in the second refractive correction region B3, and PPT1 is the refractive index trough value at each first wave trough T1 in the second refractive correction region B3. PPS2 is the refractive peak value at each second wave crest S2 in the third refractive correction region C3, and PPT2 is the refractive trough value at each second wave trough T2 in the third refractive correction region C3.

[0029] As can be seen from the refractive power distribution curve in Figure 3, in the third embodiment, the distance from the center point of the central optical region 10 to the boundary of the central optical region 10 is Z1 = 1.0 mm, the distance that the first outer ring optical region 20 extends from the boundary of the central optical region 10 to the boundary of the first outer ring optical region 20 is Z2 = 1.0 mm, the distance that the second outer ring optical region 30 extends from the boundary of the first outer ring optical region 20 to the boundary of the second outer ring optical region 30 is Z3 = 1.0 mm, and the distance that the third outer ring optical region 40 extends from the boundary of the second outer ring optical region 30 to the boundary of the third outer ring optical region 40 is Z4 = 1.0 mm. In the refractive power distribution curve, the total length from the center point of the central optical region 10 to the boundary of the third outer ring optical region 40 is Z1 + Z2 + Z3 + Z4 = 4.0 mm. The refractive error PPSD for the first refractive correction region A3 is -1.00D, the refractive error peak value PPS1 for the second refractive correction region B3 is 1.00D, the refractive error trough value PPT1 for the second refractive correction region B3 is 0.00D, the refractive error peak value PPS2 for the third refractive correction region C3 is 2.00D, and the refractive error trough value PPT2 for the third refractive correction region C3 is 1.00D.

[0030] Therefore, based on the detailed numerical values ​​of the refractive power distribution curve described above, the conditional formula for the ophthalmic lens 300 described above becomes the following specific numerical values ​​in the third embodiment: (1) Z1+Z2+Z3+Z4=4.0mm; (2) Z1 = 1.0 mm; (3) Z2 = 1.0 mm; (4) Z3 = 1.0 mm; (5) Z4 = 1.0 mm; (6) PPSD = -1.00D; (7) PPSD - PPS1 = -2.00D; (8) PPS1 - PPS2 = -1.00D; (9) │PPS1-PPT1│=1.00D; (10) │PPS2-PPT2│=1.00D.

[0031] As described above, the third embodiment satisfies all of the conditions (1) to (10) set for the ophthalmic lens 300 described above. Furthermore, in the ophthalmic lens 300 of the third embodiment, the second refractive correction region B3 and the third refractive correction region C3 are located between the two first refractive correction regions A3, and the refractive power of the second refractive correction region B3 and the third refractive correction region C3 is higher than that of each first refractive correction region A3. Here, the difference between the refractive power peak value and the refractive power trough value of the second refractive correction region B3 |PPS1-PPT1| and the difference between the refractive power peak value and the refractive power trough value of the third refractive correction region C3 |PPS2-PPT2| are both the same. Thus, the ophthalmic lens 300, through its multifocal refractive power design, reduces the refractive power difference between any two adjacent regions among the central optical region 10, the first outer ring optical region 20, the second outer ring optical region 30, and the third outer ring optical region 40, thereby reducing visual fatigue for the wearer and providing a clearer and more comfortable experience when wearing the ophthalmic lens 300.

[0032] As shown in Figure 4, the ophthalmic lens 400 according to a fourth preferred embodiment of the present invention includes a central optical region 10, a first outer ring optical region 20, a second outer ring optical region 30, and a third outer ring optical region 40. The configuration of the central optical region 10, the first outer ring optical region 20, the second outer ring optical region 30, and the third outer ring optical region 40 in the fourth embodiment is basically the same as described above for the first embodiment, that is, the first outer ring optical region 20, the second outer ring optical region 30, and the third outer ring optical region 40 are structured to surround the central optical region 10 in order.

[0033] The ophthalmic lens 400 defines two first refractive correction regions A4, one second refractive correction region B4, and one third refractive correction region C4, which can be arbitrarily positioned in any of the central optical region 10, the first outer ring optical region 20, the second outer ring optical region 30, and the third outer ring optical region 40. As shown in Figure 4, in the fourth embodiment, in the refractive power distribution curve diagram of the ophthalmic lens 400, the two first refractive correction regions A4 are positioned adjacent to the first outer ring optical region 20 and the second outer ring optical region 30, the second refractive correction region B4 is located in the central optical region 10, and the third refractive correction region C4 is located in the third outer ring optical region 40. Here, each first refractive correction region A4 exhibits a horizontal straight line in the refractive frequency distribution curve, while the second refractive correction region B4 and the third refractive correction region C4 exhibit a continuously changing wave shape with multiple peaks in the refractive frequency distribution curve. Specifically, the second refractive correction region B4 has multiple first peaks S1 and multiple first troughs T1 in the refractive frequency distribution curve, and the third refractive correction region C4 has multiple second peaks S2 and multiple second troughs T2 in the refractive frequency distribution curve. However, in other embodiments, the second refractive correction region B4 and the third refractive correction region C4 only need to have at least one peak.

[0034] In order to ensure that the ophthalmic lens 400 has a good visual acuity correction effect, in the fourth embodiment, the ophthalmic lens 400 satisfies the following condition: (1) 3.5mm≦Z1+Z2+Z3+Z4≦5.0mm; (2) 0.25mm ≤ Z1 ≤ 1.4mm; (3) 0.25mm ≤ Z2 ≤ 1.4mm; (4) 0.25mm ≤ Z3 ≤ 1.4mm; (5) 0.25mm ≤ Z4 ≤ 1.4mm; (6) -1.00D≦PPSD≦1.00D; (7) -3.00D≦PPSD-PPS1≦3.00D; (8) -4.00D≦PPS1-PPS2≦4.00D; (9) 1.00D≦│PPS1-PPT1│≦4.00D; (10) 1.00D≦│PPS2-PPT2│≦4.00D.

[0035] Here, Z1 is the distance from the center point of the central optical region 10 to the boundary of the central optical region 10, and Z2 is the distance that the first outer ring optical region 20 extends from the boundary of the central optical region 10 to the boundary of the first outer ring optical region 20. Z3 is the distance that the second outer ring optical region 30 extends from the boundary of the first outer ring optical region 20 to the boundary of the second outer ring optical region 30, and Z4 is the distance that the third outer ring optical region 40 extends from the boundary of the second outer ring optical region 30 to the boundary of the third outer ring optical region 40. PPSD is the refractive index of each first refractive correction region A4, PPS1 is the refractive index peak value at each first wave crest S1 in the second refractive correction region B4, and PPT1 is the refractive index trough value at each first wave trough T1 in the second refractive correction region B4. PPS2 is the refractive peak value at each second wave crest S2 in the third refractive correction region C4, and PPT2 is the refractive trough value at each second wave trough T2 in the third refractive correction region C4.

[0036] As can be seen from the refractive power distribution curve in Figure 4, in the fourth embodiment, the distance from the center point of the central optical region 10 to the boundary of the central optical region 10 is Z1 = 1.0 mm, the distance that the first outer ring optical region 20 extends from the boundary of the central optical region 10 to the boundary of the first outer ring optical region 20 is Z2 = 1.0 mm, the distance that the second outer ring optical region 30 extends from the boundary of the first outer ring optical region 20 to the boundary of the second outer ring optical region 30 is Z3 = 1.0 mm, and the distance that the third outer ring optical region 40 extends from the boundary of the second outer ring optical region 30 to the boundary of the third outer ring optical region 40 is Z4 = 1.0 mm. In the refractive power distribution curve, the total length from the center point of the central optical region 10 to the boundary of the third outer ring optical region 40 is Z1 + Z2 + Z3 + Z4 = 4.0 mm. The refractive error PPSD for the first refractive correction region A4 is -1.00D, the refractive error peak value PPS1 for the second refractive correction region B4 is 1.00D, the refractive error trough value PPT1 for the second refractive correction region B4 is 0.00D, the refractive error peak value PPS2 for the third refractive correction region C4 is 2.00D, and the refractive error trough value PPT2 for the third refractive correction region C4 is 1.00D.

[0037] Therefore, based on the detailed numerical values ​​of the refractive power distribution curve described above, the conditional formula for the ophthalmic lens 400 described above becomes the following specific numerical values ​​in the fourth embodiment: (1) Z1+Z2+Z3+Z4=4.0mm; (2) Z1 = 1.0 mm; (3) Z2 = 1.0 mm; (4) Z3 = 1.0 mm; (5) Z4 = 1.0 mm; (6) PPSD = -1.00D; (7) PPSD - PPS1 = -2.00D; (8) PPS1 - PPS2 = -1.00D; (9) │PPS1-PPT1│=1.00D; (10) │PPS2-PPT2│=1.00D.

[0038] As described above, the fourth embodiment satisfies all of the conditions (1) to (10) set for the ophthalmic lens 400 described above. Furthermore, in the ophthalmic lens 400 of the fourth embodiment, two first refractive correction regions A4 are arranged adjacent to the second refractive correction region B4 and the third refractive correction region C4, and the refractive power of the second refractive correction region B4 and the third refractive correction region C4 is higher than that of each first refractive correction region A4. Here, the difference between the refractive power peak value and refractive power trough value of the second refractive correction region B4 |PPS1-PPT1| and the difference between the refractive power peak value and refractive power trough value of the third refractive correction region C4 |PPS2-PPT2| are both the same. Thus, the ophthalmic lens 400, through its multifocal refractive power design, reduces the refractive power difference between any two adjacent regions among the central optical region 10, the first outer ring optical region 20, the second outer ring optical region 30, and the third outer ring optical region 40, thereby reducing visual fatigue for the wearer and providing a clearer and more comfortable experience when wearing the ophthalmic lens 400.

[0039] As shown in Figure 5, the ophthalmic lens 500 according to the fifth preferred embodiment of the present invention includes a central optical region 10, a first outer ring optical region 20, a second outer ring optical region 30, and a third outer ring optical region 40. The configuration of the central optical region 10, the first outer ring optical region 20, the second outer ring optical region 30, and the third outer ring optical region 40 in the fifth embodiment is basically the same as described above for the first embodiment, that is, the first outer ring optical region 20, the second outer ring optical region 30, and the third outer ring optical region 40 are structured to surround the central optical region 10 in order.

[0040] The ophthalmic lens 500 defines two first refractive correction regions A5, one second refractive correction region B5, and one third refractive correction region C5, which can be arbitrarily positioned in any of the central optical region 10, the first outer ring optical region 20, the second outer ring optical region 30, and the third outer ring optical region 40. As shown in Figure 5, in the fifth embodiment, in the refractive power distribution curve diagram of the ophthalmic lens 500, the two first refractive correction regions A5 are located in the first outer ring optical region 20 and the third outer ring optical region 40, the second refractive correction region B5 is located in the central optical region 10, and the third refractive correction region C5 is located in the second outer ring optical region 30. Here, each first refractive correction region A5 exhibits a horizontal straight line in the refractive frequency distribution curve, while the second refractive correction region B5 and the third refractive correction region C5 exhibit a continuously changing wave shape with multiple peaks in the refractive frequency distribution curve. Specifically, the second refractive correction region B5 has multiple first peaks S1 and multiple first troughs T1 in the refractive frequency distribution curve, and the third refractive correction region C5 has multiple second peaks S2 and multiple second troughs T2 in the refractive frequency distribution curve. However, in other embodiments, the second refractive correction region B5 and the third refractive correction region C5 only need to have at least one peak each.

[0041] In order to ensure that the ophthalmic lens 500 has a good visual acuity correction effect, in the fifth embodiment, the ophthalmic lens 500 satisfies the following condition: (1) 3.5mm≦Z1+Z2+Z3+Z4≦5.0mm; (2) 0.25mm ≤ Z1 ≤ 1.4mm; (3) 0.25mm ≤ Z2 ≤ 1.4mm; (4) 0.25mm ≤ Z3 ≤ 1.4mm; (5) 0.25mm ≤ Z4 ≤ 1.4mm; (6) -1.00D≦PPSD≦1.00D; (7) -3.00D≦PPSD-PPS1≦3.00D; (8) -4.00D≦PPS1-PPS2≦4.00D; (9) 1.00D≦│PPS1-PPT1│≦4.00D; (10) 1.00D≦│PPS2-PPT2│≦4.00D.

[0042] Here, Z1 is the distance from the center point of the central optical region 10 to the boundary of the central optical region 10, and Z2 is the distance that the first outer ring optical region 20 extends from the boundary of the central optical region 10 to the boundary of the first outer ring optical region 20. Z3 is the distance that the second outer ring optical region 30 extends from the boundary of the first outer ring optical region 20 to the boundary of the second outer ring optical region 30, and Z4 is the distance that the third outer ring optical region 40 extends from the boundary of the second outer ring optical region 30 to the boundary of the third outer ring optical region 40. PPSD is the refractive index of each first refractive correction region A5, PPS1 is the refractive index peak value at each first wave crest S1 in the second refractive correction region B5, and PPT1 is the refractive index trough value at each first wave trough T1 in the second refractive correction region B5. PPS2 is the refractive peak value at each second wave crest S2 in the third refractive correction region C5, and PPT2 is the refractive trough value at each second wave trough T2 in the third refractive correction region C5.

[0043] As can be seen from the refractive power distribution curve in Figure 5, in the fifth embodiment, the distance from the center point of the central optical region 10 to the boundary of the central optical region 10 is Z1 = 1.0 mm, the distance that the first outer ring optical region 20 extends from the boundary of the central optical region 10 to the boundary of the first outer ring optical region 20 is Z2 = 1.0 mm, the distance that the second outer ring optical region 30 extends from the boundary of the first outer ring optical region 20 to the boundary of the second outer ring optical region 30 is Z3 = 1.0 mm, and the distance that the third outer ring optical region 40 extends from the boundary of the second outer ring optical region 30 to the boundary of the third outer ring optical region 40 is Z4 = 1.0 mm. In the refractive power distribution curve, the total length from the center point of the central optical region 10 to the boundary of the third outer ring optical region 40 is Z1 + Z2 + Z3 + Z4 = 4.0 mm. The refractive error PPSD for the first refractive correction region A5 is -1.00D, the refractive error peak value PPS1 for the second refractive correction region B5 is 1.00D, the refractive error trough value PPT1 for the second refractive correction region B5 is 0.00D, the refractive error peak value PPS2 for the third refractive correction region C5 is 2.00D, and the refractive error trough value PPT2 for the third refractive correction region C5 is 1.00D.

[0044] Therefore, based on the detailed numerical values ​​of the refractive power distribution curve described above, the conditional formula for the ophthalmic lens 500 described above becomes the following specific numerical values ​​in the fifth embodiment: (1) Z1+Z2+Z3+Z4=4.0mm; (2) Z1 = 1.0 mm; (3) Z2 = 1.0 mm; (4) Z3 = 1.0 mm; (5) Z4 = 1.0 mm; (6) PPSD = -1.00D; (7) PPSD - PPS1 = -2.00D; (8) PPS1 - PPS2 = -1.00D; (9) │PPS1-PPT1│=1.00D; (10) │PPS2-PPT2│=1.00D.

[0045] As described above, the fifth embodiment satisfies all of the conditions (1) to (10) set for the ophthalmic lens 500 described above. Furthermore, in the ophthalmic lens 500 of the fifth embodiment, one first refractive correction region A5 is located between the second refractive correction region B5 and the third refractive correction region C5, and the other first refractive correction region A5 is located on one side of the third refractive correction region C5. In addition, the refractive power of the second refractive correction region B5 and the third refractive correction region C5 are higher than that of each first refractive correction region A5. Here, the difference between the refractive power peak value and refractive power trough value of the second refractive correction region B5 |PPS1-PPT1| and the difference between the refractive power peak value and refractive power trough value of the third refractive correction region C5 |PPS2-PPT2| are both the same. Thus, the ophthalmic lens 500, through its multifocal refractive power design, reduces the refractive power difference between any two adjacent regions among the central optical region 10, the first outer ring optical region 20, the second outer ring optical region 30, and the third outer ring optical region 40, thereby reducing visual fatigue for the wearer and providing a clearer and more comfortable experience when wearing the ophthalmic lens 500.

[0046] As described above, the ophthalmic lenses according to the first to fifth embodiments reduce the refractive power difference in any adjacent region between the central optical region 10, the first outer ring optical region 20, the second outer ring optical region 30, and the third outer ring optical region 40 by designing with multifocal refractive power, thereby reducing the visual fatigue of the wearer. This allows for a clearer and more comfortable visual effect when wearing the ophthalmic lens. Furthermore, the ophthalmic lens allows for the arbitrary allocation of two first refractive correction regions, a second refractive correction region, and a third refractive correction region to any of the central optical region, the first outer ring optical region, the second outer ring optical region, and the third outer ring optical region, according to the requirements for visual acuity correction. By setting individual refractive powers for each refractive correction region, the diversity of the refractive power arrangement of the ophthalmic lens can be improved.

[0047] The above description is merely a preferred embodiment of the present invention, and equivalent changes or modifications made based on the specification and claims of the present invention are, of course, also included within the technical scope of the present invention. [Explanation of Symbols]

[0048] 100, 200, 300, 400, 500: Ophthalmic レンズ 10: Central Optical Field 20: First outer ring optical field 30: Second outer ring optical field 40: Third outer ring optical field O: Center point S1: First peak T1: First trough S2: Second peak T2: Second trough A1, A2, A3, A4, A5: First area of ​​flexion correction B1, B2, B3, B4, B5: Second flexion correction area C1, C2, C3, C4, C5: Third flexion correction area

Claims

1. A central optical region having a central point, A first outer ring optical region surrounding the central optical region, A second outer ring optical region surrounding the first outer ring optical region, A third outer ring optical region surrounding the second outer ring optical region, An ophthalmic lens having the following features: The aforementioned ophthalmic lens defines two first refractive correction regions, one second refractive correction region, and one third refractive correction region. These two first refractive correction regions, the second refractive correction region, and the third refractive correction region are arbitrarily arranged in any of the central optical region, the first outer ring optical region, the second outer ring optical region, and the third outer ring optical region. The ophthalmic lens has a refractive power distribution curve, the first refractive correction region exhibits a horizontal straight line in the refractive power distribution curve, and the second and third refractive correction regions each exhibit a wave-like shape with at least one peak in the refractive power distribution curve. Furthermore, an ophthalmic lens characterized by satisfying the following ranges. 3.5mm≦Z1+Z2+Z3+Z4≦5.0mm (Here, Z1 is the distance the central optical region extends from the center point to the boundary of the central optical region, Z2 is the distance the first outer ring optical region extends from the boundary of the central optical region to the boundary of the first outer ring optical region, Z3 is the distance the second outer ring optical region extends from the boundary of the first outer ring optical region to the boundary of the second outer ring optical region, and Z4 is the distance the third outer ring optical region extends from the boundary of the second outer ring optical region to the boundary of the third outer ring optical region.)

2. The ophthalmic lens according to claim 1, characterized in that the two first refractive correction regions are arranged in two of the regions of the central optical region, the first outer ring optical region, the second outer ring optical region, and the third outer ring optical region, and the second refractive correction region and / or the third refractive correction region is arranged between the two first refractive correction regions.

3. The ophthalmic lens according to claim 1, characterized in that the two first refractive correction regions are arranged adjacent to two of the regions among the central optical region, the first outer ring optical region, the second outer ring optical region, and the third outer ring optical region, and the second refractive correction region or the third refractive correction region is arranged on one side of either of the first refractive correction regions.

4. The ophthalmic lens according to claim 1, characterized in that the two first refractive correction regions are arranged adjacent to the first outer ring optical region and the second outer ring optical region, the second refractive correction region and the third refractive correction region are located in the central optical region and the third outer ring optical region, and the two first refractive correction regions are arranged between the second refractive correction region and the third refractive correction region.

5. The ophthalmic lens according to any one of claims 1 to 4, characterized in that the ophthalmic lens satisfies the following ranges. -1.00D≦PPSD≦1.00D (Here, PPSD is the refractive power of each of the first refractive correction regions.)

6. The ophthalmic lens according to any one of claims 1 to 4, characterized in that the ophthalmic lens satisfies the following ranges. -3.00D≦PPSD-PPS1≦3.00D (Here, PPSD is the refractive index of each of the first refractive correction regions, and PPS1 is the refractive index peak value of the second refractive correction region.)

7. The ophthalmic lens according to any one of claims 1 to 4, characterized in that the ophthalmic lens satisfies the following ranges. -4.00D≦PPS1-PPS2≦4.00D (Here, PPS1 is the peak refractive index value of the second refractive correction region, and PPS2 is the peak refractive index value of the third refractive correction region.)

8. An ophthalmic lens according to any one of claims 1 to 4, characterized in that the second refractive correction region has a plurality of first peaks and a plurality of first troughs in the refractive power distribution curve, and satisfies the following range. 1.00D≦│PPS1-PPT1│≦4.00D (Here, PPS1 is the refractive index peak value of each of the first wave crests in the second refractive correction region, and PPT1 is the refractive index trough value of each of the first wave troughs in the second refractive correction region.)

9. An ophthalmic lens according to any one of claims 1 to 4, characterized in that the third refractive correction region has a plurality of second peaks and a plurality of second troughs that continuously change in the refractive power distribution curve, and satisfies the following range. 1.00D≦│PPS2-PPT2│≦4.00D (Here, PPS2 is the refractive index peak value of each of the second wave crests in the third refractive correction region, and PPT2 is the refractive index trough value of each of the second wave troughs in the third refractive correction region.)

10. The ophthalmic lens according to claim 1, characterized in that the ophthalmic lens satisfies the following ranges. 0.25mm≦Z1≦1.4mm (Here, Z1 is the distance that the central optical region extends from the center point to the boundary of the central optical region.)

11. The ophthalmic lens according to claim 1, characterized in that the ophthalmic lens satisfies the following ranges. 0.25mm≦Z2≦1.4mm (Here, Z2 is the distance that the first outer ring optical region extends from the boundary of the central optical region to the boundary of the first outer ring optical region.)

12. The ophthalmic lens according to claim 1, characterized in that the ophthalmic lens satisfies the following ranges. 0.25mm≦Z3≦1.4mm (Here, Z3 is the distance over which the second outer ring optical region extends from the boundary of the first outer ring optical region to the boundary of the second outer ring optical region.)

13. The ophthalmic lens according to claim 1, characterized in that the ophthalmic lens satisfies the following ranges. 0.25mm≦Z4≦1.4mm (Here, Z4 is the distance over which the third outer ring optical region extends from the boundary of the second outer ring optical region to the boundary of the third outer ring optical region.)

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