JPH02196211A - Lens for spectacles - Google Patents

Abstract

PURPOSE:To obtain the lens which neither increases in weight nor has various aberrations even when the degree increases, and also has a good appearance by constituting the whole or part of the lens for spectacles so that microlenses are arranged without any gap. CONSTITUTION:The part A of the lens for spectacles is constituted so that the microlenses of 0.1 - 3mm in diameter are arranged without any gap. In this case, the microlens part is formed nearby the optical center of the good performance of the spectacle lens, so a chromatic aberration and various aberrations are hardly generated. Further, even when a plastic lens or minus lens increases in degree, the lens is formed to the same thickness and weight with a plane lens which is used for ordinary sunglasses. This lens can easily by formed by forming a mold and injecting plastic. When the degree of the lower half of the microlens is varied successively, a progressive-degree multifocal lens is obtained.

Description

[Detailed description of the invention] This invention relates to spectacle lenses.

Traditional eyeglass lenses have a stronger power.

In the case of minus lenses, the edge thickness and in the case of plus lenses, the center thickness became thicker, and the amount of overlap increased. (Figure 9
(See FIG. 1O) Furthermore, with the minus lens, when the lens was viewed from the front slightly diagonally, ridges due to total reflection were visible around the edge of the lens, resulting in an unsightly appearance. (See FIG. 11) The present invention has been made to eliminate these drawbacks.

As shown in Figures 1 and 2, if you create a structure in which fine lenses with a diameter of about 0.1 to 3 mm are lined up without gaps, the entire surface of the lens will be located near the optical center, where the lens has the best performance. Chromatic aberration and Seidel's five aberrations (spherical aberration, coma aberration, astigmatism, distortion, and curvature aberration) rarely occur.

Further, the cross sections of the two lenses are as shown in FIGS. 3 to 6.

3 and 4 are cross-sectional views of the plus lens, and FIGS. 5 and 6 are cross-sectional views of the minus lens.

No matter how strong it is, whether it's positive or negative, it's still the same thickness and width as a flat (non-prescription) lens used in regular sunglasses.

It would be difficult to make a lens with this type of structure using glass, but it could be made by making something like a mold and pouring liquid plastic into it.

By the way, if you install this fine lens only in the lower half and change it progressively downward so that the power is on the slightly positive side, you can create a so-called progressive multifocal lens, which is suitable for eyes with presbyopia. It becomes a bifocal lens.

This is different from conventional progressive power multifocal lenses because the medium aperture and near vision lenses are wide from end to end on the left and right, giving a wider field of view, and there is no prism error. ,
There is no distortion or elm in the statue.

Furthermore, as a bifocal lens for eyes with presbyopia, the lenses may be arranged with the correct points spaced apart, as shown in FIGS. 7 and 8.

If you do this, for example, if you have emmetropia and presbyopia, you can use a full-field bifocal lens that allows you to see clearly in the distance without a degree and with a degree of 1 degree.

This is because, in this case, whether you look at a distance or a near field, two types of images are reflected on the retina: a slightly blurry image and a clear image, but in the visual center (occipital lobe of the brain), Quite naturally, or rather automatically, you will select only the clearer image and avoid looking at the blurry image. (This is called "suppression" in ophthalmology.) In addition, even in the case of bifocal lenses with this gap, the microscopic effect is applied only to the necessary areas, such as the lower half or lower third, rather than the entire lens surface. Allows you to position the lens.

In that case, you can also increase the power by going down.

This way, even though it is a progressive multifocal lens, you will be able to see intermediate and short distances on the sides of the lens, and you will be able to see your feet without blurring.

And I don't feel any elm or sagging.

Regardless of whether there is a gap or not, by providing a fine lens on either the front or back side and adding appropriate sphericity or astigmatism (due to toric surface) to the other side, any refractive error can be avoided. can also be accommodated.

[Brief explanation of the drawing]

FIG. 1 is a front view of the lens of the present invention, and FIG. 2 is a partially enlarged view of the lens. FIGS. 3 and 4 are cross-sectional views of the lens of the present invention, and FIGS. 5 and 6 are partially enlarged views of the lens. It is a diagram. FIG. 7 is a front view of an applied example of the present invention, FIG. 8 is a partially enlarged view thereof, and FIG. 9, FIG. 10, and FIG. ii are explanatory views of a conventional example. 11!12

Claims (2)

[Claims] (1) Spectacle lenses in which fine lenses are lined up on the entire surface or part of the lens without gaps. (2) Spectacle lenses in which fine lenses are lined up on the entire surface or in part with gaps between them.