How is the interpupillary distance measured in glasses? How to measure the interpupillary distance o

How to measure interpupillary distance:

1. The examiner and the patient are seated facing each other at a distance of 40cm, so that the sight of the two people is kept at the same height.

2. The examiner holds the interpupillary ruler or ruler with the thumb and index finger of the right hand, and the rest of the fingers are leaning on the patient's cheek, and then places the interpupillary ruler at the lowest point of the nose bridge and slightly inclines along the angle of the nose bridge.

3. The examiner closes the right eye, so that the patient's right eye fixes on the examiner's left eye, and the examiner aligns the "zero position" of the pupil ruler with the patient's right eye when the left eye fixes on the patient's right eye.

4. The examiner opens the right eye and closes the left eye, so that the patient's left eye fixes the examiner's right eye, and the examiner accurately reads the value of the interpupillary distance ruler in the center of the pupil of the patient's left eye when the right eye fixes on the patient's left eye.

5. The examiner repeats step 3 to confirm whether the "zero position" of the interpupillary distance ruler is aligned with the center of the pupil of the patient's right eye. If it is accurate, the value read in step 4 is the interpupillary distance of the patient.

There are four parts to the process of fitting glasses: an accurate optometry, choosing a frame, lens thickness, and adjusting the glasses.

1. Accurate optometry sheet. The data of the optometry sheet includes the degree of myopia or farsightedness of the left and right eyes of the optician, as well as the interpupillary distance of both eyes. If there is astigmatism, the degree of astigmatism and the axis position of the astigmatism are also required.

2. Be cautious when choosing a frame. The shape of the spectacle frame is very important, in principle, a square or rectangular face is suitable for an oval or rectangular frame with a certain curvature, a round face is suitable for any shape of frame other than a circle, and an oval or melon seed face is generally suitable for any shape of frame. Frame size is also important, and only those that fit your size are more comfortable.

The larger the frame, the heavier the weight, and the higher the requirements for the refractive index of the lens.

3. Whether the glasses are suitable for you depends on the thickness of the spectacle lens. The thickness of the lens is directly related to the refractive index of the lens. The higher the refractive index at the same power, the thinner the lens.

The refractive index can be selected within 300 degrees, the refractive index can be selected at 300-500 degrees, the refractive index can be selected at 500-800 degrees, and the refractive index can be selected above 800 degrees74 refractive index.

4. After the glasses are selected, you also need to make adjustments according to your face shape when you take the glasses, such as whether the nose pads fit the bridge of the nose, whether the hooks of the temples are just hanging on the ears, whether the glasses are chucked, etc., so that the glasses are adjusted to be more comfortable to wear.

If you want to open an optical store, the investment is generally 5-100,000 yuan, and the cost of joining a brand optical store is usually between 10-200,000 yuan, and the higher can reach more than 500,000 yuan. In the case of limited funds, if you want to join to get help, it is recommended to choose the brand, some of which are free of franchise fees, and there will not be much investment. And it is easier to open the market, which can better introduce later consumption.

The new glasses need to get used to it a little, don't worry!

About the measurement of interpupillary distance: There is a special pupillary distance meter in the optical store to measure, you can also measure it yourself, use a ruler to put it in front of your eyes, look at the distance between the two eye centers, and look at the distance between the two eye centers, that is, your interpupillary distance, but you don't know the processing interpupillary distance of the glasses yourself!

If you still feel dizzy after wearing it for two days, it is recommended to go directly to the optical store for confirmation!

Hope! Thank you!

Interpupillary distance can be measured in hospitals and professional opticians.

Before dispensing glasses, you should go to the hospital or optician store to have your pupillary distance and prescription professionally measured, because these places use professional machines, so that the glasses will not be uncomfortable or dizzy.

With good glasses, not only with cherry blossoms, but also with accurate diopters.

Interpupillary distance measurement must also be done well. If there is a significant error in the interpupillary distance of corrective glasses with a slightly larger refraction, even if the diopter meets the requirements, it will feel uncomfortable or even unbearable to wear, because the balance of the eye muscles of the two eyes is disrupted.

The glasses are fitted with interpupillary distance in them.

Parameters, can be tested by a focimeter, just put the spectacle lens on the focimeter to get the data. And the data is very accurate.

The interpupillary distance of the glasses is measured by a regular instrument, and his everything Wang glasses will. As soon as you put it in the middle, you can come out.

How to measure the interpupillary distance of the glassesWe can't withdraw this, we have to find a professional person to help test it.

Interpupillary distance is the distance between the centers of the pupils of both eyes. If you want to measure your own interpupillary distance, you can choose the ruler method.

After finding a mirror, the subject stands or sits approximately 20 cm away from the mirror. Prepare a graduated ruler with the edge of the ruler on the top edge of the eye or against the eyebrows, and place it straight. At this point, the subject faces the mirror and looks straight ahead with both eyes.

Align the ruler's 0 scale with the center of the subject's left pupil in the mirror, and at the same time, read the scale with the center of the right pupil aligned. The value read in this case is the distance from the center of the pupils of both eyes. Measure 3 or 4 times repeatedly, take the average value, and prevent the error from being too large.

A pair of glasses is composed of two optical lenses, and the distance between the optical centers of the two lenses should be consistent with the interpupillary distance of the person, so that the human eye will feel comfortable for the leaker, and when there is a large deviation, it will be obviously uncomfortable.

The vertical mutual difference of the optical center of the glasses is manifested as one high and one low optical center of the two lenses, while the horizontal mutual difference is manifested as the asymmetry of the optical center of the two lenses, one mile and one outside, and the astigmatism axis error is manifested as the axis of the lens is inconsistent with the visual axis of the human eye, and ghosting occurs. In particular, vertical contrast has a greater impact on vision. One of the biggest reasons for the wrong interpupillary distance of glasses is actually the inconsistency of the specifications of the lenses and frames.

If the IPD measurement is inaccurate, the glasses will have a prism effect.

Although the interpupillary distance of glasses is not correct, the biggest reason is that it is not in harmony with the specifications of the lenses and frames. However, when refraction, due to wrong refraction or inaccurate measurement of interpupillary distance, it will also cause the phenomenon of incorrect interpupillary distance of glasses. <>

1. The surveyor and the person being measured sit facing each other, and the person being measured looks at a fixed object 5 meters or more behind the surveyor.

2. The measurer holds the right end of the ruler with his right hand, and the "zero" scale on the left side of the ruler is aimed at the center point (pupil) of the black eye of the right eye of the measured person, and then observes the scale on the ruler corresponding to the center point of the black eye (pupil) of the left eye of the measured person, accurate to the millimeter, and the interpupillary distance of the measured person is at this moment.

3. Repeat step 2, measure a total of 3 times, and take the average value, so that the conventional distal interpupillary distance is measured.