Pair of spectacle lenses for binocular vision, manufacturing method, supply system and supply program thereof

Patent metadata

Field	Value
Publication number	US-2017371181-A1
Application number	US-201515539716-A
Country	US
Kind code	A1
Filing date	Dec 28, 2015
Priority date	Dec 26, 2014
Publication date	Dec 28, 2017
Grant date	—

Abstract

A pair of spectacle lenses for binocular vision. In each of the pair of spectacle lenses for binocular vision, when an inner horizontal direction of each of the spectacle lenses is a direction toward the nose of a user who wears the spectacle lenses, and an outer horizontal direction of each of the spectacle lenses is a direction toward an ear of the user, a portion for viewing an object at finite distance is provided and a shape of a base out prism is formed in the position such that a line of sight of a user viewing an object through the portion is directed to a direction that is different from a direction from the object.

First claim

1 . A pair of spectacles lenses for binocular vision, wherein
when an inner horizontal direction of each of the spectacle lenses is a direction toward the nose of a user who wears the spectacle lenses, and an outer horizontal direction of each of the spectacle lenses is a direction toward an ear of the user, a portion for viewing an object at a finite distance is disposed in each of the pair of spectacle lenses for binocular vision, and a shape of a base out prism is formed in the portion such that a line of sight of the user viewing the object through the portion is directed to a direction that is different from a direction from the object.

2 . The pair of spectacle lenses for binocular vision according to claim 1 , wherein
the portion for viewing an object at a finite distance is a near portion.

3 . The pair of spectacle lenses for binocular vision according to claim 1 , wherein
each of the spectacle lenses includes a portion in which power changes continuously.

4 . The pair of spectacle lenses for binocular vision according to claim 3 , wherein
when the upper direction of each of the spectacle lenses is a direction of top of the spectacle lens and the lower direction of each of the spectacle lenses is a direction of bottom of the spectacle lens while the user wears the spectacle lens, the base out prism is disposed in a part that is lower than a specific distance power measurement point, a prism power measurement point, or a fitting point in the spectacle lens.

5 . The pair of spectacle lenses for binocular vision according to claim 3 , wherein
each of the spectacle lenses includes a portion for viewing an object at a specific distance, a near portion for viewing an object at a distance nearer than the specific distance, and a progressive portion which is between the portion and the near portion and in which the power changes, the spectacle lenses satisfying the following equation:
P N −P F >ADD* h/ 10
where P F denotes an amount of prism (Δ) at a power measurement point of the portion for viewing an object at a specific distance, and P N denotes an amount of prism (Δ) at a near power measurement point, and the amount of prism indicates a positive value in a case of a base out prism and a negative value in a case of a base in prism; and ADD denotes an addition power (D), and h denotes an amount of inset (mm) in the spectacle lens, in which a positive direction is toward the nose and a negative direction is toward the ear, when viewing from a vertical line connecting an upper vertex and a lower vertex of the spectacle lens.

6 . The pair of spectacle lenses for binocular vision according to claim 5 , wherein
each of the spectacle lenses satisfies the following equation:
| P N −P F −ADD* h/ 10|≧0.25.

7 . The pair of spectacle lenses for binocular vision according to claim 3 , wherein
when the upper direction of each of the spectacle lenses is a direction of top of the spectacle lens and the lower direction of each of the spectacle lenses is a direction of bottom of the spectacle lens while the user wears the spectacle lens, at least a part of the portion of the spectacle lens includes a shape of continuously twisting at least one of the shapes of an object side surface and an eyeball side surface of the spectacle lens in a horizontal cross-sectional view of the portion, in the lower direction of the spectacle lens, so that the amount of the base out prism increases in the lower direction.

8 . The pair of spectacle lenses for binocular vision according to claim 7 , wherein
an absolute value of a difference between surface power values in the vertical direction in positions ±15 mm from a point, through which a main line of sight passes, is 0.25 D or more, on a line which is parallel with a line passing through two engraving marks of the spectacle lens and which passes through any point on a line segment connecting a specific distance power measurement point and a near power measurement point.

9 . The pair of spectacle lenses for binocular vision according to claim 8 , wherein
any point on the line segment connecting the specific distance power measurement point and the near power measurement point is located in a ±3 mm range in a perpendicular direction from a mid-point as reference between the specific distance power measurement point and the near power measurement point.

10 . The pair of spectacle lenses for binocular vision according to claim 7 , wherein
the absolute value of a difference between the surface power values in the horizontal direction in positions ±5 mm from a point, through which a main line of sight passes, is 0.12 D or more, on a line which is parallel with a line passing through two engraving marks of the spectacle lens and which passes through any point on a line segment connecting a specific distance power measurement point and a near power measurement point.

11 . The pair of spectacle lenses for binocular vision according to claim 10 , wherein
any point on the line segment connecting the specific distance power measurement point and the near power measurement point is located in a ±3 mm range in the perpendicular direction from a mid-point as reference between the specific distance power measurement point and the near power measurement point.

12 . The pair of spectacle lenses for binocular vision according to claim 3 , wherein
the shape of the base out prism is also formed in parts in the inner horizontal direction and in the outer horizontal direction when viewed from the portion of the spectacle lens.

13 . The pair of spectacle lenses for binocular vision according to claim 12 , wherein
when the upper direction of each of the spectacle lenses is a direction of top of the spectacle lens and the lower direction of each of the spectacle lenses is a direction of bottom of the spectacle lens while the user wears the spectacle lens, an absolute value of a difference between surface power values in the vertical direction in positions ±15 mm from a point, through which a main line of sight passes, is 0.25 D or more, on a line which is parallel with a line passing through two engraving marks of the spectacle lens and which passes through a point that is 3 mm higher in the vertical direction from a mid-point of a line segment connecting a specific distance power measurement point and a near power measurement point.

14 . The pair of spectacle lenses for binocular vision according to claim 12 , wherein
an absolute value of a difference between surface power values in the vertical direction in positions ±15 mm from a point, through which a main line of sight passes, is 0.25 D or more, on a line which is parallel with a line passing through two engraving marks of the spectacle lens and which passes through a mid-point of a line segment connecting a specific distance power measurement point and a near power measurement point.

15 . The pair of spectacle lenses for binocular vision according to claim 12 , wherein
when the upper direction of each of the spectacle lenses is a direction of top of the spectacle lens, and the lower direction of each of the spectacle lenses is a direction of bottom of the spectacle lens while the user wears the spectacle lens, an absolute value of a difference between surface power values in the vertical direction in ±15 positions mm from a point, through which a main line of sight passes, is 0.25 D or more, on a line which is parallel with a line passing through two engraving marks of the spectacle lens and which passes through a point that is 3 mm lower in the vertical direction from a mid-point of a line segmen

Assignees

• Kaga Tadashi
• Ito Ayumu
• Kozu Kazuma
• Hoya Lens Thailand Ltd

Inventors

• Kaga Tadashi
• Ito Ayumu
• Kozu Kazuma

Classifications

• G02C7/14

  Mirrors; Prisms · CPC title

• G02B23/12

  with means for image conversion or intensification · CPC title

• G02C7/02

  Lenses; Lens systems {; Methods of designing lenses} · CPC title

• G02C7/061

  Spectacle lenses with progressively varying focal power · CPC title

• G02C7/06

  bifocal; multifocal {; progressive (G02C7/041 takes precedence)} · CPC title