JP2012173594A5 - - Google Patents

Description

The perspective view which shows an example of spectacles. FIG. 2A is a plan view schematically showing one of the progressive-power lenses, and FIG. 2B is a cross-sectional view thereof. 3A is a diagram showing an equivalent spherical power distribution of a spectacle lens, FIG. 3B is a diagram showing an astigmatism distribution of the spectacle lens, and FIG. 3C is a distortion when a square lattice is viewed. FIG. The figure which shows a vestibule movement reflex. The figure which shows the maximum angle of vestibulo-oculomotor reflex. The figure which shows a mode that a rectangular pattern is set. The figure which overlaps and shows the geometric shift | offset | difference of a rectangular pattern. The figure which shows the change of the inclination of the grid line of a rectangular pattern. The figure which shows the variation | change_quantity of the grid line of the horizontal direction of the grid line of a rectangular pattern. The figure which shows the variation | change_quantity of the grid line of the perpendicular direction of the grid line of a rectangular pattern. 11A is a diagram showing the surface refractive power on the main gaze line of the outer surface of the progressive-power lens of Example 1, and FIG. 11B is the surface on the main gaze line of the inner surface of the progressive-power lens of Example 1. FIG. The figure which shows refractive power. 12A is a diagram showing the surface refractive power on the main gaze line of the outer surface of the progressive-power lens of Comparative Example 1, and FIG. 12B is the surface of the inner surface of the progressive-power lens of Comparative Example 1 on the main gaze line. The figure which shows refractive power. 13A shows the surface astigmatism distribution on the outer surface of the progressive-power lens of Example 1, and FIG. 13B shows the surface astigmatism distribution on the outer surface of the progressive-power lens of Comparative Example 1. Figure. FIG. 14 (a) shows a spherical equivalent surface power distribution of the outer surface of the progressive addition lens of Example 1, FIG. 14 (b) spherical equivalent surface power distribution of the outer surface of the progressive addition lens of Comparative Example 1 FIG. FIG. 15A is a diagram showing the surface astigmatism distribution on the inner surface of the progressive addition lens of Example 1, and FIG. 15B is the surface astigmatism distribution on the inner surface of the progressive addition lens of Comparative Example 1. Figure. FIG. 16 (a) shows a spherical equivalent surface power distribution of the inner surface of the progressive addition lens of Example 1, FIG. 16 (b) spherical equivalent surface power distribution of the inner surface of the progressive addition lens of Comparative Example 1 FIG. FIG. 17A is a diagram showing the astigmatism distribution of the progressive-power lens of Example 1, and FIG. 17B is a diagram showing the astigmatism distribution of the progressive-power lens of Comparative Example 1. 18A is a diagram showing an equivalent spherical power distribution of the progressive-power lens of Example 1, and FIG. 18B is a diagram showing an equivalent spherical power distribution of the progressive-power lens of Comparative Example 1. The figure which shows a vibration (vibration parameter | index IDd). The figure which shows deformation | transformation amount (vibration index IDs). 21A is a diagram showing the surface refractive power on the main gaze line of the outer surface of the progressive-power lens of Example 2, and FIG. 21B is the surface on the main gaze line of the inner surface of the progressive-power lens of Example 2. FIG. The figure which shows refractive power. 22A is a diagram showing the surface refractive power on the main gaze line of the outer surface of the progressive-power lens of Comparative Example 2, and FIG. 22B is the surface of the inner surface of the progressive-power lens of Comparative Example 2 on the main gaze line. The figure which shows refractive power. FIG. 23A is a diagram showing the surface astigmatism distribution on the outer surface of the progressive-power lens of Example 2, and FIG. 23B is the surface astigmatism distribution on the outer surface of the progressive-power lens of Comparative Example 2. Figure. Figure 24 (a) is a view showing an equivalent spherical surface power distribution of the outer surface of the progressive addition lens of example 2, FIG. 24 (b) is an equivalent spherical surface power distribution of the outer surface of the progressive addition lens of Comparative Example 2 FIG. FIG. 25A is a diagram showing the surface astigmatism distribution on the inner surface of the progressive-power lens of Example 2, and FIG. 25B is the surface astigmatism distribution on the inner surface of the progressive-power lens of Comparative Example 2. Figure. Figure 26 (a) is a view showing an equivalent spherical surface power distribution of the inner surface of the progressive addition lens of example 2, FIG. 26 (b) is an equivalent spherical surface power distribution of the inner surface of the progressive addition lens of Comparative Example 2 FIG. FIG. 27A is a diagram showing the astigmatism distribution of the progressive addition lens of Example 2, and FIG. 27B is a diagram showing the astigmatism distribution of the progressive addition lens of Comparative Example 2. FIG. 28A is a diagram showing an equivalent spherical power distribution of the progressive-power lens of Example 2, and FIG. 28B is a diagram showing an equivalent spherical power distribution of the progressive-power lens of Comparative Example 2. The figure which shows a vibration (vibration parameter | index IDd). The figure which shows deformation | transformation amount (vibration index IDs). The flowchart which shows the process of design and manufacture of a progressive-power lens.

Of the optical performance of the progressive power lens 10, the width of the field of view can be known from an astigmatism distribution diagram and an equivalent spherical power distribution diagram. One of the performances of the progressive-power lens 10 is that the vibration (sway) that is felt when the head is moved while wearing the progressive-power lens 10 is important, and astigmatism distribution and equivalent spherical power distribution are almost all. Even if they are the same, a difference may occur with respect to the wobble. In the following, first, an evaluation method for fluctuation will be described, and the results of comparison between the embodiment of the present application and a conventional example will be shown using the evaluation method.

1. FIG. 3A shows an equivalent spherical power distribution (unit: diopter (D)) of a typical progressive-power lens 10, and FIG. 3B shows an astigmatism distribution (unit: diopter). (D)) is shown, and FIG. 3C shows a state of distortion when the square lattice is viewed by the lens 10. In the progressive-power lens 10, a predetermined power is added along the main gaze line 14. Therefore, due to the addition of the power, a large astigmatism is generated on the side of the intermediate region (intermediate portion, progressive region) 13, and the object appears blurred in that portion. In the equivalent spherical power distribution, the power is increased by a predetermined amount in the near portion 12, and the power is sequentially decreased to the intermediate portion 13 and the distance portion 11. In the progressive-power lens 10, the power of the distance portion 11 (distance power, Sph) is 3.00D (diopter), and the addition power (ADD) is 2.00D.

FIG. 13A shows the surface astigmatism distribution of the outer surface 19A of the progressive addition lens 10a of Example 1, and FIG. 13B shows the surface astigmatism of the outer surface 19A of the progressive addition lens 10b of Comparative Example 1. Distribution is shown. FIG. 14A shows an equivalent spherical surface refractive power distribution of the outer surface 19A of the progressive addition lens 10a of Example 1, and FIG. 14B shows an equivalent of the outer surface 19A of the progressive addition lens 10b of Comparative Example 1. The spherical surface refractive power distribution is shown. The equivalent spherical surface refractive power ESP is obtained by the following expression (14).
ESP = (OHP + OVP) / 2 (14)

As shown in FIG. 13 (a), the outer surface 19A of the progressive-power lens 10a of Example 1 includes uniform 3.0 (D) surface astigmatism, but does not show an equivalence line because it is uniform. Further, as shown in FIG. 14 (a), the equivalent spherical surface refractive power of the outer surface 19A is uniform 7.5 (D), and since it is uniform, no equivalence line appears. On the other hand, as shown in FIG. 13B, the outer surface 19A of the progressive addition lens 10b of Comparative Example 1 has a surface astigmatism of 0.0 (D), and as shown in FIG. The equivalent spherical surface power of 19A is uniformly 6.0 (D).

15A shows the surface astigmatism distribution of the inner surface 19B of the progressive addition lens 10a of Example 1, and FIG. 15B shows the surface astigmatism of the inner surface 19B of the progressive addition lens 10b of Comparative Example 1. Distribution is shown. FIG. 16A shows an equivalent spherical surface refractive power distribution of the inner surface 19B of the progressive addition lens 10a of Example 1, and FIG. 16B shows an equivalent of the inner surface 19B of the progressive addition lens 10b of Comparative Example 1. The spherical surface refractive power distribution is shown.

Spherical equivalent surface power shown in FIG. 16 (a) essentially +1.5 (D) is a spherical equivalent surface power distribution of the progressive addition lens 10a of the first embodiment shown in is shown in FIG. 16 (b) It is uniformly added to the equivalent spherical surface refractive power distribution of the progressive addition lens 10b of Comparative Example 1. However, it can be seen that this is not a simple composition due to the effect of aspherical correction.

FIG. 17A shows an astigmatism distribution observed through each position on the progressive-power lens 10a of Example 1, and FIG. 17B shows the progressive-power lens of Comparative Example 1. The astigmatism distribution when observed through each position on the lens 10b is shown. FIG. 18A shows the equivalent spherical power distribution observed through each position on the lens of the progressive addition lens 10a of Example 1, and FIG. 18B shows the progressive refraction of Comparative Example 1. The equivalent spherical power distribution when observing through each position on the lens of the force lens 10b is shown.

The astigmatism distribution of the progressive addition lens 10a of Example 1 shown in FIG. 17A is almost the same as the astigmatism distribution of the progressive addition lens 10b of Comparative Example 1 shown in FIG. is there. Also, the equivalent spherical power distribution of the progressive addition lens 10a of Example 1 shown in FIG. 18A is almost the same as the equivalent spherical power distribution of the progressive addition lens 10b of Comparative Example 1 shown in FIG. It is equivalent. Therefore, as the progressive addition lens 10a of the first embodiment, by effectively using the aspheric correction, the progressive power lens 10b of the comparative example 1 has almost the same performance in the astigmatism distribution and the equivalent spherical power distribution. It turns out that a refractive power lens is obtained.

As described above, the progressive addition lens 10a of Example 1 in which the elements of the toric surface are introduced into the outer surface 19A and the inner surface 19B has an astigmatism distribution and an equivalent spherical power distribution, which are general performances as a spectacle lens, toric. It has the same performance as that of the progressive addition lens 10b of Comparative Example 1 that is a spherical surface that does not include surface elements (as a spectacle lens that does not target astigmatism correction). Furthermore, it was found that the progressive-power lens 10a of Example 1 can reduce the fluctuation of the image when the line of sight 2 (eyeball 3) moves due to vestibulo-oculomotor reflection compared to the progressive-power lens 10b of Comparative Example 1. . This is because the toric surface element is inserted into the inner and outer surfaces, and particularly when the toric surface element is introduced into the inner and outer surfaces of the region along the main gazing line 14, the line of sight 2 is moved by the vestibulo-oculomotor reflex. It is considered that one of the factors is that the change of the angle at which the line of sight 2 enters and exits the spectacle lens 10a can be suppressed, and the fluctuation of various aberrations when the line of sight 2 moves due to the vestibulo-oculomotor reflection.

FIG. 23A shows the surface astigmatism distribution of the outer surface 19A of the progressive addition lens 10c of Example 2, and FIG. 23B shows the surface astigmatism of the outer surface 19A of the progressive addition lens 10d of Comparative Example 2. Distribution is shown. FIG. 24A shows an equivalent spherical surface refractive power distribution of the outer surface 19A of the progressive addition lens 10c of Example 2, and FIG. 24B shows an equivalent of the outer surface 19A of the progressive addition lens 10d of Comparative Example 2. The spherical surface refractive power distribution is shown.

Similar to the first embodiment, the outer surface 19A of the progressive-power lens 10c of the second embodiment includes a uniform 3.0 (D) surface astigmatism, but does not show an equivalence line because it is uniform. Further, the equivalent spherical surface refractive power of the outer surface 19A is uniformly 4.0 (D), and since it is uniform, no equivalence line appears. On the other hand, the outer surface 19A of the progressive-power lens 10d of Comparative Example 2 has a surface astigmatism of 0.0 (D), and the equivalent spherical surface power of the outer surface 19A is uniformly 2.5 (D).

FIG. 25A shows the surface astigmatism distribution of the inner surface 19B of the progressive addition lens 10c of Example 2, and FIG. 25B shows the surface astigmatism of the inner surface 19B of the progressive addition lens 10d of Comparative Example 2. Distribution is shown. FIG. 26A shows the equivalent spherical surface refractive power distribution of the inner surface 19B of the progressive addition lens 10c of Example 2, and FIG. 26B shows the equivalent inner surface 19B of the progressive addition lens 10d of Comparative Example 2. The spherical surface refractive power distribution is shown.

Similar to the first embodiment, the surface astigmatism of the progressive-power lens 10c of the second embodiment is basically 3.0 (D) with the main principal meridian in the horizontal direction. In addition to the surface astigmatism of the progressive-power lens 10d. However, since aspherical correction for adjusting aberration is added, it is not a simple composition. Further, spherical equivalent surface power of the progressive addition lens 10d of the spherical equivalent surface power is Comparative Example 2 essentially +1.5 (D) is a spherical equivalent surface power distribution of the progressive addition lens 10c of Example 2 A uniform addition to the distribution. However, due to the effect of aspherical correction, this is not a simple composition.

FIG. 27A shows an astigmatism distribution when observed through each position on the progressive-power lens 10c of Example 2, and FIG. 27B shows the progressive-power lens of Comparative Example 2. Astigmatism distribution when observed through each position on the lens of 10d is shown. FIG. 28A shows an equivalent spherical power distribution observed through each position on the lens of the progressive addition lens 10c of Example 2, and FIG. 28B shows the progressive refraction of Comparative Example 2. An equivalent spherical power distribution when viewed through each position on the lens of the force lens 10d is shown.

The astigmatism distribution of the progressive addition lens 10c of Example 2 shown in FIG. 27A is almost equal to the astigmatism distribution of the progressive addition lens 10d of Comparative Example 2 shown in FIG. is there. Further, the equivalent spherical power distribution of the progressive addition lens 10c of Example 2 shown in FIG. 28A is almost the same as the equivalent spherical power distribution of the progressive addition lens 10d of Comparative Example 2 shown in FIG. It is equivalent. Therefore, by effectively using the aspherical correction as the progressive addition lens 10c of the second embodiment, the progressive power lens 10c of the comparative example 2 has almost the same performance in the astigmatism distribution and the equivalent spherical power distribution. It turns out that a refractive power lens is obtained.