JP2005249842A - Prescription seal lens - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate the problem that spectacle lenses can not be worn after being purchased since a wearing feeling of original progressive refracting-power lenses can not be sufficiently experienced because of thickness effect of eye examination lenses with progressive refracting power used for the test of wearing etc. <P>SOLUTION: A sheet type lens of ≤1 mm in thickness is formed of an irreversibly deformable material such as polyethylene or polycarbonate. This lens is stuck on an eye examination lens to enable refracting power adjustment without awareness of thickness effect. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The sealed lens with a degree of the present invention is mainly attached to a refractive correction spectacle lens and used for adjusting the refractive power.

  FIG. 3 is a conceptual diagram of an optometric lens used when determining the refractive power of a spectacle lens. Basically, the refractive power of a spectacle lens is determined by three factors: spherical refractive power, astigmatic refractive power, and astigmatic axis direction. For this reason, a spherical lens corresponding to the spherical refractive power is arranged at the position 11 in the figure, and a cylinder lens corresponding to the astigmatic refractive power is arranged at the position 12. The direction of the astigmatism axis is adjusted to the wearer's astigmatism axis direction by rotating the cylinder lens 12 around the optical axis OA. Further, when a wearing test or the like of a progressive power lens is performed, a progressive power lens having a distance dioptric power of zero diopter having a predetermined addition power is arranged at a position 13 in FIG.

  When ordering a spectacle lens, the sum of the individual refractive powers of the spherical lens 11, the cylinder lens 12, and the progressive addition lens 13 is transmitted to the manufacturer. The manufacturer manufactures one spectacle lens based on the combined refractive power. However, in the optometry lens described above, since three thick lenses are stacked, the optical characteristics are different from those of an actual spectacle lens. In particular, in the progressive power lens wearing test, the progressive power lens is arranged at a position far away from the eyeball, so the effect of the addition power and the distortion of the image peculiar to the progressive power lens are the actual lens. In many cases, there were many problems.

  In order to solve these problems, it is only necessary to reduce the thickness of the optometric lens and to reduce the distance between the lenses as much as possible. For this reason, the idea of sticking a sticker having a refractive effect on the lens is easily conceived and in fact some prior art can be seen.

  For example, Patent Document 1 discloses that a UV-cured product having a plus power is attached to the front surface of a single focus lens to be used as a lens for near vision. This ultraviolet-cured product is detachable and can be used as a single focus lens for far vision by removing it.

  Patent Documents 2 and 3 disclose that the function of sunglasses is imparted by attaching a colored transparent sheet to the lens surface. This transparent sheet is detachable, and when the sunglasses effect is unnecessary, it can be removed and used as normal glasses.

JP-A-10-62728 JP 10-110035 A JP 2003-121802 A

  Since the pasted lens of Patent Document 1 is a lens cured by ultraviolet rays, it cannot be freely deformed after being molded once. Therefore, it must be designed in advance according to the shape of the single focus lens to be attached, and it is difficult to say that it can be used for general purposes. Further, since it is intended to obtain the addition power of 1.00, 2.00, 3.00 diopter, etc. with a single lens, it is necessary to prepare a lens according to the addition power, which increases the cost.

  In Patent Document 2 and Patent Document 3, since a thin and deformable sheet is detached, it can be used for various lenses relatively freely. However, since these are sheets having no power, the refractive power cannot be changed.

  In order to solve the above-mentioned problems, the sealed lens according to the present invention is a transparent reversibly deformable sheet having two bent surfaces, and the refractive power of the sheet is −1.00 diopter or more and +1. It is less than or equal to 00 diopters.

  The sealed lens with a degree of the present invention is characterized in that the thickness of the optical center portion is 1 mm or less and the thickness of the region from the optical center to the radius of 10 mm to 30 mm is 1 mm or less.

  Furthermore, an adhesive substance that can be repeatedly stuck and peeled is applied to at least one of the two refracting surfaces.

  In addition, the sealed lens with degree of the present invention is preferably a transparent and soft material such as polyethylene or polycarbonate.

  The sealing lens with a degree of the present invention can increase or decrease the refractive power in steps of ± 1.00 diopters or less by freely attaching and peeling to a spectacle lens or an optometry lens. Further, since the thickness of the prescription seal lens itself is 1 mm or less, a change in refractive power due to the thickness of the lens and the wearing position is unlikely to occur, and it is also possible to use a plurality of stacked layers. Furthermore, even if it is attached to a spectacle lens or the like, it can be used with almost no awareness of the increase in weight. Due to these effects, conventionally, the only way to change the power of the spectacle lens or the optometry lens is to replace it with an expensive lens. However, by using the pre-sealed seal lens of the present invention, it is low when the power change is relatively small. The frequency can be changed at a cost. Further, it is possible to prescribe an accurate lens by measuring the refractive power in a state closer to an actual spectacle lens than by measuring a refractive power by stacking a plurality of lenses like an optometric lens.

  The present invention will be described below with reference to the drawings.

  FIG. 1 is a conceptual diagram of a sealed lens with a degree of the present invention. The lens material is low-density polyethylene, the refractive index is n = 1.5, the refractive surface 11 is a spherical surface with a radius of curvature of 100.000 mm, and the refractive surface 12 is also a spherical surface with a radius of curvature of 100.267 mm. The center thickness t of the lens is 0.8 mm, the edge thickness e is about 0.2 mm, and the lens diameter d is 50 mm. The specific gravity of this lens material was about 0.92, and the weight of the lens was about 0.7 g. This lens 1 has a refractive power of +1.00. On the refracting surface 12, an adhesive 2 for applying to a spectacle lens or the like was uniformly applied with a thickness of about 0.1 mm. As shown in FIG. 2, the seal lens with this degree is used by being attached to the spectacle lens 3 or the like. In FIG. 1, the sealed lens with a degree of the present invention is a biconvex lens. However, since the lens material is a material that can be deformed, it can be attached exactly according to the refractive surface shape of the spectacle lens 3 as shown in FIG. it can. Furthermore, since it can be cut according to the shape of the spectacle lens as shown in FIG.

  Table 1 summarizes another example of the sealed lens with a degree together with Example 1 described above. The lens material is the same as above, with a refractive index n = 1.5 and a specific gravity of 1.36. The refractive power is changed from +1.00 (D) to -1.00 (D). If lenses having refractive powers from +1.00 (D) to -1.00 (D) are arranged as a set as described above, for example, when a lens of +1.75 (D) is desired, the lens of Example 1 is used. The object can be achieved by attaching the lens, the lens of Example 2 and the lens of Example 3 so as to overlap as shown in FIG. When the lens itself is thick like an optometric lens and must be used with a distance between each lens, +1.00 (D), +0.50 (D), and +0.25 due to the effect of these thicknesses. Even if the lens of (D) is overlapped, it does not become +1.75 (D), but the lens thickness effect of the present invention is almost negligible, so simply use the lens with the necessary refractive power in a stack. Can achieve the purpose. In addition, the weight of the lens is as light as several grams, and even if a plurality of lenses are attached, the comfort of wearing is not deteriorated.

  Table 2 is a list of Example 3 made of a polycarbonate material having a refractive index of 1.6 and a specific gravity of 1.2. Since the refractive index is high, a thinner lens than that in Example 2 could be produced.

  Since the influence of the power change by the thickness of the lens can be ignored, the sealed lens with a degree of the present invention can be used in a scene where a combination of a plurality of lenses is necessary like an optometric lens. In particular, in the case of a wearing test of a progressive-power lens, the sticker with the degree of the present invention is attached to the progressive-power lens to be subjected to the wearing test, so that it is close to the degree of progressive-power lens actually purchased. A wear test can be performed in the state.

  In addition, when the degree of progress advances while wearing spectacles, a conventional lens must be remade a lens that costs tens of thousands of yen even if the change is about 0.5 (D). By attaching an attached sticker lens, it is possible to deal with slight changes in power without having to replace the lens.

  Furthermore, since the prescription seal lens of the present invention can be easily attached / removed, when a near vision is desired for a short time, about +1.00 (D) is attached to the currently worn spectacle lens. Therefore, it is possible to use the eyeball to reduce fatigue and reduce fatigue.

  In addition, although the Example in polyethylene and a polycarbonate was demonstrated as a representative example of a transparent and soft material, this invention is applicable also to another plastic type material.

The conceptual diagram of the sealing lens with a degree of this invention. The use conceptual diagram of a seal lens with a degree. The use conceptual diagram of the sealing lens with a shape of spectacles frame shape. The use conceptual diagram of a plurality of seal lenses with a degree.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Lens part of seal lens with degree 2 ... Adhesion part 3 of seal lens with degree ... Eyeglass lens 11 ... First refractive surface 12 of seal lens with degree ... Second refractive surface t: Center thickness of the sealed lens with degree e: Edge thickness of the sealed lens with degree

Claims (4)

A transparent sealable sheet having two bending surfaces, wherein the refractive power of the sheet is −1.00 diopter or more and +1.00 diopter or less. 2. The sealed lens according to claim 1, wherein the thickness of the optical center portion is 1 mm or less, and the thickness of the region from the optical center to a radius of 10 mm to 30 mm is 1 mm or less. . It is a sealing lens with a degree in any one of Claim 1 or 2, Comprising: The adhesive substance which can be repeatedly affixed and peeled is apply | coated to at least one refractive surface among two refractive surfaces, It is characterized by the above-mentioned. Seal lens with every time. 4. The sealed lens according to claim 1, wherein the sealed lens is polyethylene or polycarbonate.

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