Progressive addition lens and method for manufacturing thereof

A multi-focus, progressive technology, applied in glasses/goggles, optics, instruments, etc., can solve the problem that the use cannot be intuitive

Active Publication Date: 2020-04-24
鲁普哈伯拉克光学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this system requires complex and expensive mechanisms and controllers to move the lens holders, and its use cannot be intuitive

Method used

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  • Progressive addition lens and method for manufacturing thereof
  • Progressive addition lens and method for manufacturing thereof
  • Progressive addition lens and method for manufacturing thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0055] figure 1 A side view of the head of a user wearing glasses is shown. The spectacles comprise a frame 3 attached to lenses 4 , and temples 8 . Another lens and another temple are symmetrically attached to the right side of the glasses.

[0056] Some technical terms used in the procedures described below are first defined.

[0057] In anatomy, the Frankfurt plane FP is defined as the plane passing through the midpoint of the subject's inferior orbital rim and the superior border of the concha, which is the highest point of the skull of the ear canal, corresponding to the tragus of the ear point, the highest point of the tragus of the ear. The sagittal plane of the user's head is a plane that is orthogonal to the Frankfurt plane and passes through the middle of the two centers of rotation of the eyes.

[0058] figure 1 In , the user is considered to be in an upright position in which he exerts the least effort. figure 1 In , the user is considered to be sitting or st...

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PUM

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Abstract

The invention concerns a progressive addition lens (4) comprising a first fitting point (11), a near vision reference point (14) and a first optical spherical power variation between the first fittingpoint (11) and the near vision reference point (14). According to the invention, the lens (4) further comprises a second fitting point (11, 18) and a night vision reference point (31) located on a same face (6, 7) of the lens (4), the night vision reference point (31) being positioned on an eye gaze direction (32) inclined by an upward eye gaze declination angle (33) when the user wears the progressive addition lens (4) mounted in a frame (3) with a downward head declination angle (34) opposite to the upward eye gaze declination angle (33) without moving the frame (3) relatively to the user'sface (9), the progressive addition lens (4) presenting a second optical spherical power variation between the second fitting point (11, 18) and the night vision reference point (31), said night vision reference point (31) having a lower optical spherical power than the second fitting point (11, 18).

Description

technical field [0001] The present invention relates to an ophthalmic lens and a method for manufacturing the ophthalmic lens. [0002] More precisely, the invention relates to an ophthalmic lens suitable for correcting vision in daytime and night vision conditions and a method for its manufacture. Background technique [0003] Numerous documents describe devices and methods for designing and manufacturing multifocal lenses and progressive addition lenses having a lens power in the near vision zone and another lens power in the distance vision zone. [0004] However, vision at night may decrease due to night myopia. In such cases, a different lens power is required compared to daytime correction. In order to obtain proper correction during the day and at night, some users have two different glasses, one with a distance lens power that corrects daytime vision and another with a lens optimized for night vision. This solution requires the purchase of two rather expensive gla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02C7/06
CPCG02C7/065G02C7/066G02C7/068G02C7/027
Inventor R·斯图姆T·施泰因M·比辛格尔
Owner 鲁普哈伯拉克光学有限公司
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