CN103217813A

CN103217813A - New method for measuring near pupil distance and near pupil height

Info

Publication number: CN103217813A
Application number: CN2013101022658A
Authority: CN
Inventors: 陈翔; 苏翠云; 黄家欣; 刁红星
Original assignee: Optometry Center Of Affiliated Eye Hospital Of Sun Yat-Sen University
Current assignee: Optometry Center Of Affiliated Eye Hospital Of Sun Yat-Sen University
Priority date: 2013-03-27
Filing date: 2013-03-27
Publication date: 2013-07-24

Abstract

The invention provides a new method for measuring pupil distance and pupil height. According to the needs of different people for near vision and the personal eyeglass usage habit, the near pupil distance and the near pupil height of the left and right eyes are measured by a ruler through pupil reflection points reflected by the mirror surface when near vision is taken. According to the new method provided by the invention, the optical center and the optical height of people can be accurately measured when the people see the near object, and thus, the prism effect generated by lens when people take near vision can be reduced, the asthenopia symptoms, such as ghost image in vision, eye swelling and headache, caused by difference between the optical center distance and the pupil distance can be reduced, and a clear field of near vision is provided for a wearer.

Description

A kind of nearly usefulness interpupillary distance and nearly high new method of pupil of using measured

Technical field:

The present invention relates to a kind of eyesight measurement method, be specifically related to a kind of nearly interpupillary distance and nearly high new method of pupil of using used of measuring.

Background technology:

When wearing glasses, because everyone face type is in different size, the distance between two eyes may be different, so everyone is also different from the position that the center of lens of glasses is seen away.If the optical centre position of eyeglass have one higher one on the low side, perhaps take back for one, one takes over, thing distortion may appear seeing in the wearer, eye expands, symptoms such as headache appear in severe patient.Particularly the elderly is because the eye's lens sclerosis, regulatory function descends, occur seeing that near objects is unintelligible, be commonly called as " presbyopic ", need wear and see the glasses of usefulness nearby specially, and human eye is being seen far away and is being seen that when near, the position of pupil center can change, and that is to say that everyone sees that far away and the distance of seeing needed lens optical center when near are different.Be exactly that upward should see blackboard class hour clearly sees books clearly to students again in addition, sometimes far just see and put on one's glasses, see that written word just takes off glasses, perhaps glasses are pushed away the low spot books, be used alternatingly like this, it is bad to get off for a long time to make child to form the reading writing posture, and the method for wearing glasses is incorrect.

The optist only measured the distance of seeing when far away between two eye pupil centers when routine got the right lensses for one's eyeglasses, and was called that far away (its measuring method is: 1, examiner and examinee sit facing each other at equal height (arm is far away, about 40cm) with interpupillary distance; 2, the interpupillary distance chi is placed on examinee's bridge of the nose, attention maintenance level avoids (position of interpupillary distance chi is equivalent to the mirror plane); 3, the examiner closes right eye (avoiding Parallax), the glasses (left eye) that instruct the examinee to watch the examiner attentively to open; 4, the examiner places own left eye below with the pen type torch, and front illuminated examinee so that determine pupil center location, but must guard against direct projection examinee pupil, and the examinee should not watch torch light attentively yet; 5, observation examinee cornea of right eye is reflective; 6, read on the interpupillary distance chi simple eye interpupillary distance scale that should center, eye pupil hole, be this mono-vision interpupillary distance numerical value far away; 7, measure the simple eye interpupillary distance of left eye with method; 8, repeat 2～3 times, get average), generally closely can see that reducing 3～4mm conduct on the basis of interpupillary distance far away sees near interpupillary distance usually with interpupillary distance (it is meant two distances of looking two pupil center when near).

These methods are a kind of "ball-park" estimate, be fit to general crowd, the near work person wears glasses apart from different in the modern society, the position difference of wearing glasses all can have influence on the sharpness of seeing thing, and particularly everyone is in the change of looking head when near, the change of health, spectacle frame run-off the straight when seeing near objects is caused in the capital, and (it is a height of closely using the interpupillary distance center, refers to the distance of closely putting picture frame lower edge bottom minimum point with optics of eye to have influence on the interpupillary distance of seeing near objects and pupil height.And everyone the high relation in spectacle-frame inclination angle and pupil is the every increase by 2 of top rake when near looking., the angle that the high 1mm that reduces of pupil, this and everyone look when near has very big influence), have influence on the sharpness that Dai Jing sees near objects afterwards.

Solve being clear degree problem, at first will solve accurate measurement closely with interpupillary distance and the nearly high problem of pupil of using.Now, human demand to glasses increases day by day, and a lot of especially people wish looking near and looking far and can both wear clear and comfortable glasses.The glasses market developing trend is two light, progressive and multifocal lens.Look near interpupillary distance and look nearly pupil height and play considerable effect preparing a secondary multifocal spectacles.

Summary of the invention:

The purpose of this invention is to provide a kind of according to different people to the custom of looking near demand, personal glasses, by look when near the pupil reflective spot of direct reflection measure near with interpupillary distance with near with the high new method of pupil.

Measurement of the present invention closely is characterized in that with the high new method of pupil with near with interpupillary distance, may further comprise the steps:

(1), examiner and examinee sit facing each other, two people's sight lines remain on sustained height;

(2), according to those who are investigated individual at ordinary times look nearly custom, the examiner with mirror be placed in those who are investigated's custom look closely before, those who are investigated have on glasses and watch " ten " word in the mirror attentively;

(3), the examiner closes left eye, the right eye in the hand-held electric torch projection examinee mirror, mark those who are investigated cornea of right eye is looked the reflective spot when near on the support sheet, is right eye support sheet gauge point;

(4), the examiner closes right eye, the left eye in the hand-held electric torch projection examinee mirror, mark those who are investigated cornea of left eye is looked the reflective spot when near on the support sheet, is left eye support sheet gauge point;

(5), take off one's glasses, glasses are placed on the plane, measure distance with ruler from right eye support sheet gauge point to the distance the mirror holder bridge of the nose center, from right eye support sheet gauge point to right eye mirror circle lower edge inside groove; Same method is measured the distance from left eye support sheet gauge point to the distance the mirror holder bridge of the nose center, from left eye support sheet gauge point to left eye mirror circle lower edge inside groove;

(6), repeat above-mentioned steps (3)～(5) 3 times, respectively average, be right eye closely with interpupillary distance and closely with pupil height, left eye closely with interpupillary distance with closely use the pupil height.

The present invention can look nearly time custom at different people, accurately measure them and see the optical centre and the optics height of near objects, can reduce like this and look the prism effect that eyeglass produces when near, reduce owing to optical center distance and unequal the seeing of producing of interpupillary distance are looked the thing ghost image, eye expands, headache waits the visual fatigue symptom, provides to the wearer and sees that more clearly myopia is wild.

Description of drawings

Fig. 1 is a synoptic diagram of the present invention.

Fig. 2 is that right and left eyes is closely with interpupillary distance and near with the high instrumentation plan of pupil.

Wherein, 1, mirror holder bridge of the nose center; 2, right eye support sheet gauge point; 3, left eye support sheet gauge point; 4, right eye mirror circle lower edge inside groove; 5, left eye mirror circle lower edge inside groove.

Embodiment:

Following examples are to further specify of the present invention, rather than limitation of the present invention.

Embodiment 1:

Measure the near of those who are investigated's left eye and right eye and use interpupillary distance and closely use the pupil height, specific as follows:

(2), according to those who are investigated individual at ordinary times look nearly custom, the examiner with mirror be placed in those who are investigated's custom look closely before, those who are investigated have on glasses and watch " ten " word in the mirror attentively, as shown in Figure 1;

(3), the examiner closes left eye, the right eye in the hand-held electric torch projection examinee mirror, mark those who are investigated cornea of right eye is looked the reflective spot when near on the support sheet, is right eye support sheet gauge point 2;

(4), the examiner closes right eye, the left eye in the hand-held electric torch projection examinee mirror, mark those who are investigated cornea of left eye is looked the reflective spot when near on the support sheet, is left eye support sheet gauge point 3;

(5), take off one's glasses, glasses are placed on the plane, measure from right eye support sheet gauge point 2 to the distance the mirror holder bridge of the nose center 1 with ruler, be recorded as 32mm; From right eye support sheet gauge point 2 distances, be recorded as 14mm to right eye mirror circle lower edge inside groove 4; Same method is measured from left eye and is supportted sheet gauge point 3 to the distance the mirror holder bridge of the nose center 1, is recorded as 28mm, from left eye support sheet gauge point 3 distances to left eye mirror circle lower edge inside groove 5, and record 14mm, as shown in Figure 2;

(6), repeat above-mentioned steps (3)～(5) 3 times, respectively average, be right eye and closely use interpupillary distance 32mm, right eye is closely used the high 14mm of pupil, left eye is closely used interpupillary distance 28mm, left eye is closely used the high 14mm of pupil.

Closely as follows with the routine measurement right and left eyes with interpupillary distance and the nearly high method comparative result of pupil of using:

Use the routine measurement right eye closely with interpupillary distance with closely above-mentioned those who are investigated are measured with the high method of pupil, the measurement result that draws is respectively 30mm, 13mm; Use the routine measurement left eye closely with interpupillary distance with closely above-mentioned those who are investigated are measured with the high method of pupil, the measurement result that draws is respectively 26mm, 13mm.

The right and left eyes of measuring by the method for present embodiment is closely with interpupillary distance with closely more meet the nearly custom of looking of those who are investigated with the pupil height, and the glasses of being allotted have looks near-sighted open country more clearly.

Claims

1. a non-measurement that is used for the Clinics and Practices of disease closely is characterized in that with the high new method of pupil with near with interpupillary distance, may further comprise the steps:

(3), the examiner closes left eye, the right eye in the hand-held electric torch projection examinee mirror, mark those who are investigated cornea of right eye is looked the reflective spot when near on the support sheet, is right eye support sheet gauge point (2);

(4), the examiner closes right eye, the left eye in the hand-held electric torch projection examinee mirror, mark those who are investigated cornea of left eye is looked the reflective spot when near on the support sheet, is left eye support sheet gauge point (3);

(5), take off one's glasses, glasses are placed on the plane, measure from right eye support sheet gauge point (2) to the distance the mirror holder bridge of the nose center (1), support the distance of sheet gauge point (2) with ruler to right eye mirror circle lower edge inside groove (4) from right eye; Same method is measured the distance from left eye support sheet gauge point (3) to the distance the mirror holder bridge of the nose center (1), from left eye support sheet gauge point (3) to left eye mirror circle lower edge inside groove (5);