Children's Myopia Control Contact Lenses

Abstract

The present invention discloses a children's myopia control contact lens, which includes a central optical zone and a first optical zone, a second optical zone, a third optical zone, a fourth optical zone and a fifth optical zone; and the corresponding first refractive power, second refractive power, third refractive power, fourth refractive power and fifth refractive power form a corrected refractive power; the absolute values of the differences between the first refractive power, second refractive power, third refractive power, fourth refractive power and fifth refractive power and the corrected refractive power are respectively the first difference, the second difference, the third difference, the fourth difference and the fifth difference; the first difference, the second difference and the third difference increase in sequence; the third difference, the fourth difference and the fifth difference decrease in sequence. By adopting the children's myopia control contact lens with the above structure, the present invention avoids the problem that the user is difficult to adapt caused by the drastic change of the refractive power by setting the absolute values of the differences corresponding to the five optical zones to increase first and then decrease, and increases the wearing comfort.

Description

Technical Field

[0001] The present invention relates to a technology of contact lenses for myopia, and particularly to a contact lens for controlling myopia in children. Background Art

[0002] An existing optical lens for vision correction, such as the existing patent 201710948263.9, an optical lens for vision correction, discloses the combined refractive power through two optical zones, enabling the human eye visual imaging system to form a visual imaging correction optical zone that falls in front of and behind the retina optical zone. When the eye looks at a distance or near, it can be directly adjusted, reducing the compression deformation of the ciliary muscle and the lens caused by looking at a distance or near, thereby reducing the feeling of eye fatigue and the progression of myopia.

[0003] Although this optical lens for vision correction has achieved certain effects in clinically preventing the progression of myopia, however, due to the excessive change value of the refractive power between adjacent optical zones in this optical lens for vision correction, the comfort is poor, making it difficult for some users to adapt. Therefore, there is a need for further improvement.

[0004] In addition, through clinical tests, it is found that different correction refractive powers cannot use the same correction scheme for preventing the progression of myopia, especially when the correction refractive power is lower or higher, it is relatively more obvious. Summary of the Invention

[0005] The purpose of the present invention is to provide a contact lens for controlling myopia in children. By setting the absolute value of the difference corresponding to five optical zones to increase first and then decrease, the problem that users are difficult to adapt caused by the drastic change in refractive power is avoided, and the wearing comfort is increased.

[0006] To achieve the above purpose, the present invention provides a contact lens for controlling myopia in children, including a central optical zone and a first optical zone, a second optical zone, a third optical zone, a fourth optical zone, and a fifth optical zone that are concentrically arranged around the central optical zone in sequence;

[0007] The first optical zone, the second optical zone, the third optical zone, the fourth optical zone, and the fifth optical zone respectively have a first refractive power, a second refractive power, a third refractive power, a fourth refractive power, and a fifth refractive power;

[0008] The first refractive power, the second refractive power, the third refractive power, the fourth refractive power, and the fifth refractive power form a correction refractive power;

[0009] The absolute value of the difference between the first refractive power and the corrected refractive power is the first difference, the absolute value of the difference between the second refractive power and the corrected refractive power is the second difference, the absolute value of the difference between the third refractive power and the corrected refractive power is the third difference, the absolute value of the difference between the fourth refractive power and the corrected refractive power is the fourth difference, and the absolute value of the difference between the fifth refractive power and the corrected refractive power is the fifth difference;

[0010] The first difference, the second difference, and the third difference increase in sequence;

[0011] The third difference, the fourth difference, and the fifth difference decrease in sequence.

[0012] Preferably, the diameter range of the first optical zone is 0.45 mm - 0.55 mm;

[0013] The diameter range of the second optical zone is 0.95 mm - 1.05 mm;

[0014] The diameter range of the third optical zone is 1.45 mm - 1.55 mm;

[0015] The diameter range of the fourth optical zone is 1.95 mm - 2.05 mm;

[0016] The diameter range of the fifth optical zone is 3.25 mm - 3.75 mm.

[0017] Preferably, the first refractive power is between 47.5 degrees and 772.5 degrees;

[0018] The second refractive power is between 72.5 degrees and 812.5 degrees;

[0019] The third refractive power is between 102.5 degrees and 832.5 degrees;

[0020] The fourth refractive power is between 92.5 degrees and 813.5 degrees;

[0021] The fifth refractive power is between 82.5 degrees and 811.5 degrees.

[0022] Preferably, the corrected refractive power range is 100 degrees - 800 degrees, the first difference, the second difference, and the fifth difference all show a trend of first becoming larger, then smaller, and then larger again, and the third difference and the fourth difference both show a trend of first becoming smaller, then larger, and then smaller again.

[0023] Preferably, the difference between the first refractive power and the corrected refractive power is between -95 degrees and -40 degrees;

[0024] The difference between the second refractive power and the corrected refractive power is between -50 degrees and 0 degrees;

[0025] The difference between the third refractive power and the corrected refractive power is between 20 degrees and 60 degrees;

[0026] The difference between the fourth refractive power and the corrected refractive power is between 1 degree and 12 degrees;

[0027] The difference between the fifth refractive power and the corrected refractive power is between -12 degrees and -1 degree.

[0028] Preferably, the range of the corrected refractive power is 400 degrees to 500 degrees, the first difference, the second difference and the fifth difference all change to the corresponding minimum values, and the third difference and the fourth difference both change to the corresponding maximum values.

[0029] Preferably, the first refractive power, the second refractive power, the third refractive power, the fourth refractive power and the fifth refractive power are all formed by fusing a plurality of diopter parts.

[0030] Therefore, the children's myopia control contact lens with the above structure is adopted in the present invention. By setting the absolute values of the differences corresponding to the five optical zones to increase first and then decrease, the problem that the user is difficult to adapt caused by the drastic change of the diopter is avoided, and the wearing comfort is increased.

[0031] Next, through the drawings and embodiments, the technical solution of the present invention will be further described in detail. Description of the Drawings

[0032] Figure 1 It is a schematic structural diagram of an embodiment of the present invention;

[0033] Figure 2 It is a diagram of the change of the difference when the corrected refractive power of the present invention is between 100 degrees and 400 degrees;

[0034] Figure 3 It is a diagram of the change of the difference when the corrected refractive power of the present invention is between 500 degrees and 800 degrees.

[0035] Wherein: 1. Central optical zone; 2. First optical zone; 3. Second optical zone; 4. Third optical zone; 5. Fourth optical zone; 6. Fifth optical zone. Detailed Embodiment

[0036] The following will further describe the present invention in conjunction with the drawings. It should be noted that this embodiment is based on the present technical solution, and detailed implementation manners and specific operation processes are given, but the protection scope of the present invention is not limited to this embodiment.

[0037] The structure of the present invention includes a central optical zone 1, and a first optical zone 2, a second optical zone 3, a third optical zone 4, a fourth optical zone 5, and a fifth optical zone 6 that are concentrically arranged around the central optical zone 1 in sequence; the first optical zone 2, the second optical zone 3, the third optical zone 4, the fourth optical zone 5, and the fifth optical zone 6 have a first refractive power, a second refractive power, a third refractive power, a fourth refractive power, and a fifth refractive power respectively; the first refractive power, the second refractive power, the third refractive power, the fourth refractive power, and the fifth refractive power form a corrective refractive power; the absolute value of the difference between the first refractive power and the corrective refractive power is the first difference, the absolute value of the difference between the second refractive power and the corrective refractive power is the second difference, the absolute value of the difference between the third refractive power and the corrective refractive power is the third difference, the absolute value of the difference between the fourth refractive power and the corrective refractive power is the fourth difference, and the absolute value of the difference between the fifth refractive power and the corrective refractive power is the fifth difference; the first difference, the second difference, and the third difference increase in sequence; the third difference, the fourth difference, and the fifth difference decrease in sequence.

[0038] It should be noted that the aforementioned contact lens is used to generate the corrective refractive power formed by correcting myopia, is formed in the form of a concave lens and is suitable for being worn on the user's eye, so the refractive power is negative. For the convenience of understanding, the refractive power in this embodiment does not bring in the negative form represented by the concave lens form, and the mentioned refractive power is represented in the positive form.

[0039] Preferably, the diameter range of the first optical zone 2 is 0.45 mm - 0.55 mm; in this embodiment, the diameter of the first optical zone 2 is 0.5 mm. The diameter range of the second optical zone 3 is 0.95 mm - 1.05 mm; in this embodiment, the diameter of the second optical zone 3 is 1 mm. The diameter range of the third optical zone 4 is 1.45 mm - 1.55 mm; in this embodiment, the diameter of the third optical zone 4 is 1.5 mm. The diameter range of the fourth optical zone 5 is 1.95 mm - 2.05 mm; in this embodiment, the diameter of the fourth optical zone 5 is 2 mm. The diameter range of the fifth optical zone 6 is 3.25 mm - 3.75 mm. In this embodiment, the diameter of the fifth optical zone 6 is 3.5 mm.

[0040] Preferably, the first refractive power is between 47.5 degrees and 772.5 degrees; the second refractive power is between 72.5 degrees and 812.5 degrees; the third refractive power is between 102.5 degrees and 832.5 degrees; the fourth refractive power is between 92.5 degrees and 813.5 degrees; the fifth refractive power is between 82.5 degrees and 811.5 degrees.

[0041] Preferably, the refractive correction range is 100 degrees to 800 degrees. The first difference, the second difference, and the fifth difference all show a trend of first increasing, then decreasing, and then increasing again. The third difference and the fourth difference both show a trend of first decreasing, then increasing, and then decreasing again.

[0042] Preferably, the difference between the first refractive power and the refractive correction power is between -95 degrees and -40 degrees; the difference between the second refractive power and the refractive correction power is between -50 degrees and 0 degrees; the difference between the third refractive power and the refractive correction power is between 20 degrees and 60 degrees; the difference between the fourth refractive power and the refractive correction power is between 1 degree and 12 degrees; the difference between the fifth refractive power and the refractive correction power is between -12 degrees and -1 degree. Preferably, the refractive correction range is 400 degrees to 500 degrees. The first difference, the second difference, and the fifth difference all change to their corresponding minimum values, and the third difference and the fourth difference both change to their corresponding maximum values.

[0043] Preferably, the first refractive power, the second refractive power, the third refractive power, the fourth refractive power, and the fifth refractive power are all formed by fusing a plurality of diopter parts.

[0044] Table 1 is a refractive power distribution table

[0045]

[0046]

[0047]

[0048]

[0049] Example 1

[0050] As can be seen from Table 1, when the refractive correction power is actually 100 degrees, the first refractive power is actually 60 degrees, the first difference is -40 degrees, and the refractive powers of the isodopter parts in the first optical zone 2 are between 47.5 degrees and 72.5 degrees; the second refractive power is actually 90 degrees, the second difference is -10 degrees, and the refractive powers of the isodopter parts in the second optical zone 3 are between 72.5 degrees and 102.5 degrees; the third refractive power is actually 120 degrees, the third difference is 20 degrees, and the refractive powers of the isodopter parts in the third optical zone 4 are between 102.5 degrees and 132.5 degrees; the fourth refractive power is actually 105 degrees, the fourth difference is 5 degrees, and the refractive powers of the isodopter parts in the fourth optical zone 5 are between 92.5 degrees and 117.5 degrees; the fifth refractive power is actually 95 degrees, the fifth difference is -5 degrees, and the refractive powers of the isodopter parts in the fifth optical zone 6 are between 82.5 degrees and 107.5 degrees.

[0051] Since the first difference, the second difference, the third difference, the fourth difference to the fifth difference show a trend of increasing first and then decreasing, and all are not greater than 100 degrees, there will be no drastic change in the refractive power between any two adjacent ones among the first optical zone 2, the second optical zone 3, the third optical zone 4, the fourth optical zone 5 and the fifth optical zone 6, and the refractive power is close to the corrected refractive power, so the problem that the user is difficult to adapt can be avoided.

[0052] Experimental example

[0053] The clinical tests were entrusted to National Taiwan University Hospital and Taipei Tzu Chi Hospital. The number of effective test subjects was 72, and the ages of the test subjects ranged from 9 years old to 15 years old. A 52-week test and observation was carried out. One group of test subjects wore the children's myopia control contact lenses of this embodiment on one eye, and the other group wore general contact lenses on one eye. In the test results, the corrected refractive power corresponding to the average spherical equivalent refractive error (SER) of the eyes wearing the children's myopia control contact lenses of this embodiment was 70 degrees ± 49 degrees, and the average axial length (AXL) was 0.34 mm ± 0.19 mm. For the eyes wearing general contact lenses, the change in the corrected refractive power corresponding to the average spherical equivalent refractive error was 88 degrees ± 51 degrees, and the average axial length was 0.38 mm ± 0.19 mm.

[0054] Therefore, it can be seen that the eyes wearing the children's myopia control contact lenses reduced by 10.5% and 20.5% respectively in terms of the average axial length and the progression of myopia compared with the eyes wearing general contact lenses. Therefore, it can be known that the children's myopia control contact lenses are indeed effective.

[0055] It should be noted that only the refractive power is exemplified in this embodiment. Those skilled in the art should undoubtedly obtain the specific data of the unpublicized refractive power from the solution described in the present invention, so it will not be elaborated here.

[0056] Therefore, the present invention adopts the children's myopia control contact lenses with the above structure. By setting the absolute values of the differences corresponding to the five optical zones to increase first and then decrease, the problem that the user is difficult to adapt caused by drastic changes in the diopter is avoided, and the wearing comfort is increased.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions of the present invention or make equivalent replacements, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A children's myopia control contact lens, characterized in that: It includes a central optical zone and a first optical zone, a second optical zone, a third optical zone, a fourth optical zone, and a fifth optical zone that are concentrically arranged around the central optical zone in sequence; The diameter range of the first optical zone is 0.45 mm - 0.55 mm; The diameter range of the second optical zone is 0.95 mm - 1.05 mm; The diameter range of the third optical zone is 1.45 mm - 1.55 mm; The diameter range of the fourth optical zone is 1.95 mm - 2.05 mm; The diameter range of the fifth optical zone is 3.25 mm - 3.75 mm; The first optical zone, the second optical zone, the third optical zone, the fourth optical zone, and the fifth optical zone respectively have a first refractive power, a second refractive power, a third refractive power, a fourth refractive power, and a fifth refractive power; The first refractive power, the second refractive power, the third refractive power, the fourth refractive power, and the fifth refractive power form a corrected refractive power; The absolute value of the difference between the first refractive power and the corrected refractive power is the first difference, the absolute value of the difference between the second refractive power and the corrected refractive power is the second difference, the absolute value of the difference between the third refractive power and the corrected refractive power is the third difference, the absolute value of the difference between the fourth refractive power and the corrected refractive power is the fourth difference, and the absolute value of the difference between the fifth refractive power and the corrected refractive power is the fifth difference; The first difference, the second difference, and the third difference increase in sequence; The third difference, the fourth difference, and the fifth difference decrease in sequence; When the corrected refractive power changes from 100 degrees to 800 degrees, the first difference, the second difference, and the fifth difference all show a trend of first becoming smaller, then larger, and then smaller again, and the third difference and the fourth difference both show a trend of first becoming larger, then smaller, and then larger again; The difference between the first refractive power and the corrected refractive power is between -95 degrees and -40 degrees; The difference between the second refractive power and the corrected refractive power is between -50 degrees and 0 degrees; The difference between the third refractive power and the corrected refractive power is between 20 degrees and 60 degrees; The difference between the fourth refractive power and the corrected refractive power is between 1 degree and 12 degrees; The difference between the fifth refractive power and the corrected refractive power is between -12 degrees and -1 degree; When the corrected refractive power falls within 400 degrees - 500 degrees, the first difference, the second difference, and the fifth difference all change to the corresponding minimum values, and the third difference and the fourth difference both change to the corresponding maximum values.

2. The children's myopia control contact lens according to claim 1, characterized in that: The first refractive power is between 47.5 degrees and 772.5 degrees; The second refractive power is between 72.5 degrees and 812.5 degrees; The third refractive power is between 102.5 degrees and 832.5 degrees; The fourth refractive power is between 92.5 degrees and 813.5 degrees; The fifth refractive power is between 82.5 degrees and 811.5 degrees.

3. The children's myopia control contact lens according to claim 1, characterized in that: The first refractive power, the second refractive power, the third refractive power, the fourth refractive power, and the fifth refractive power are each formed by fusing a plurality of diopter parts.

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