Positioning method for glasses-matching cross curve of progressive lens and visual line distance measuring meter

A technology of spectacle cross and positioning method, which is applied in the direction of eye testing equipment, medical science, diagnosis, etc., can solve the problems of large error, eye fatigue, etc., and achieve the effect of light weight, convenient operation and high efficiency

Inactive Publication Date: 2010-06-16
JINLING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the pupillary distance is used as the line of sight distance for the existing progressive mirror cross line positioning, whi...

Method used

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  • Positioning method for glasses-matching cross curve of progressive lens and visual line distance measuring meter
  • Positioning method for glasses-matching cross curve of progressive lens and visual line distance measuring meter
  • Positioning method for glasses-matching cross curve of progressive lens and visual line distance measuring meter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for locating the cross of a progressive lens fitting, which uses a line-of-sight-mirror-surface point line-of-sight distance measuring instrument (see Example 2) to calibrate the positions of the left and right eye lines on the plane of the glasses to obtain the line-of-sight-mirror point points of the left and right eyes The horizontal distance between them is the line-of-sight distance, and then copy the line-of-sight-mirror position on the support piece of the selected frame according to the monocular line-of-sight distance to obtain the positions of the crosshairs of the left and right eyes;

[0024] The specific steps of dispensing glasses are:

[0025] Step 1: Use the visual distance measuring instrument to measure the visual distance and visual height difference between the left and right monocular eyes;

[0026] Step 2: Recommended frame selection and shaping;

[0027] Step 3: Copy the line-of-sight-mirror position on the frame support according to the...

Embodiment 2

[0031] like figure 1 , 2 shown.

[0032] A line-of-sight-mirror position measuring instrument, comprising a mirror frame 1 and a sight hole slider 2, the mirror frame 1 is integrally made of an opaque plastic sheet with a thickness of 3 mm, and the mirror frame at the front of the mirror frame 1 is provided at a position opposite to the human eye. Two elongated horizontal slits 3, the horizontal slits have a width of 30 mm and a height of about 1 mm. The horizontal slits 3 are equipped with a viewing hole slider 2 that can move left and right, such as figure 1 As shown, the viewing hole slider 2 is composed of a front block 9 and a rear block 10, which are respectively located on both sides of the frame and connected by screws 8 passing through the horizontal crack 3, as figure 2 As shown, the viewing hole slider 2 is provided with a viewing hole 11 that can pass through the horizontal crack at the relative position of the horizontal crack 3, the viewing hole slider 2 is pr...

Embodiment 3

[0034] The difference between this embodiment and Embodiment 1 is that the two horizontal cracks 3 are not at the same height, they can be left high and right low or left low and right high, and the difference between the two is about 2 millimeters. At this time, in the horizontal crack One or both ends of the 3 are provided with a vertical scale scale 4 (total height is about 2 millimeters), and a vertical scale indicator line 5 is provided on the viewing hole slide block 3 .

[0035] The operating principle and the method of use of the line of sight measuring instrument of the present invention are as follows:

[0036] exist figure 1 Among them, the present invention is made of spectacle frame 1, viewing hole slider 2. The center of the mirror frame 1 corresponding to the left and right eye regions is respectively provided with a horizontal slit 3 with a length of 30 mm and a height of 1 mm. The horizontal slit 3 has a vertical scale scale 4 on the nose and temporal side an...

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Abstract

The invention discloses a positioning method for a glasses-matching cross curve of a progressive lens and a visual line distance measuring meter. The method is characterized by: calibrating positions of left and right eye visual lines on a mirror plane with a visual line-mirror plane position visual line distance measuring meter to obtain a horizontal distance between left and right eye visual line-mirror plane position, namely a visual line distance; copying the visual line-mirror plane position on a selected support piece of an optical frame according to the visual line distance of a single eye; and then obtaining the position of the left and right eye cross curve. The invention also discloses the visual line distance measuring meter, which has the advantages of small volume, light weight, convenient operation and accurate measurement. The method and the device of the invention are a relatively ideal high-precision progressive lens matching method and a relatively ideal high-precision progressive lens matching device.

Description

[0001] Part of the content of the present invention has applied for a utility model patent at the same time. technical field [0002] The invention relates to a method for locating the center of the cross in glasses, in particular to a method for locating the center of the cross in glasses for progressive glasses and an instrument for measuring the distance of sight. Background technique [0003] Progressive mirrors can be used to solve the adjustment lag problem of presbyopic people, reduce the adjustment fatigue of young people near reading, etc. At present, the utilization rate of progressive mirrors among presbyopic people in developed countries can reach more than 60%. increasing trend. However, there are some deficiencies in the traditional positioning method of the progressive lens dispensing cross. Mainly: the cross positioning of the left and right eye progressive mirrors is based on the pupil center-mirror position; the operation of marking the pupil center and th...

Claims

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Application Information

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IPC IPC(8): A61B3/04A61B3/08
Inventor 欧阳永斌许薇王玲
Owner JINLING INST OF TECH
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