Switching from spherical glasses to non spherical glasses, the power is the same, very dizzy, why?

There are several possible reasons: first, the prescription is unreasonable, there is astigmatism that has not been added, and the spherical lens has not been adjusted (there is room for improvement in the professional skills of optometrists) affects the visual quality; The second is that the adjustment of the frame is not suitable, and it may be possible to improve the symptoms after making appropriate adjustments. Interpupillary distance error of 1 mm does not cause such symptoms, I wonder if it was otherwise detected at that time, horizontal and vertical differences?

The third is that the quality of the original mirror is too outrageous (the probability is small). Fourth, the adaptability to aspherical lenses is poor (low probability). More than 90% of our lenses are aspherical!

The interpupillary distance error is 1, which is fully in line with the national standard within more than 200 degrees!

There are three reasons why you feel dizzy:1You used to have astigmatism, but now suddenly you don't have it, some people will not get used to it, feel dizzy, and need to get used to it for a few days!

2.Some people will feel different when wearing different lenses, and I have met some people who only adapt to one coating! For example, some customers are only used to wearing blue film lenses, the same prescription, if you give him green film, he will be dizzy, and even feel unclear!

And some customers will do the opposite! Others can even wear lenses without a film (I don't know if you belong to this category).

3.The processor does not pay attention when processing the lens, resulting in the error on the lens exceeding the national standard, resulting in some wearers feeling uncomfortable!

Hello, I'm an optometrist, there are several possibilities for you in this situation!

1. You are not suitable for aspherics, some people are not suitable by nature, just like someone can't watch 3D movies!

2. Your eyes are more sensitive, generally a lower astigmatism as long as it is not added to achieve the required corrected vision, you can not add it, because there is a significant difference in astigmatism!

3. I suggest you. If you don't have a bad money, go to a regular hospital for optometry and then go out to match, and you must try it on more, so that you can adjust it in time if you find discomfort early!

Your astigmatism at this degree should not belong to the so-called physiology, you can find the "Amsley grid" on the Internet, open it on the display screen, if you wear the current glasses, you have to add the grid, the lines are not straight;

As for the error of 1mm, it doesn't matter, it is within the normal range;

In addition, if the prescription is high, this phenomenon is also normal, if you are refraction at that time, the green color of both eyes is clear during the red and green test, it is the prescription is overpowered;

I would like to ask, what brand of aspherical lenses are yours?

At present, there are the following problems in the domestic aspherical lens:

1. Aspheric does not start from the imaging quality, but only considers the thinning lens (originally the aspheric surface is based on the imaging quality, and the imaging quality is good, and the lens can also be thinned), so it is wrong from the source.

2. When aspherical surface is assembled into glasses, the assembly requirements are stricter than that of ordinary spherical lenses. In general, it is necessary to consider that the optical axis of the boresight and the optical axis of the lens coincide to achieve the best imaging results. If the fitter is a layman, you may not be as good as spherical lenses.

3. Due to the difference between aspherical and spherical lens imaging, you are used to spherical and just wear aspherical lenses, which will be uncomfortable, and it will take a little time to get used to it. However, if you still don't get used to it after a few days, it probably means that there is a problem with the glasses (there is a problem with the lens shape, or there is a problem with the fitting, or there is a problem with the prescription, or there is a problem with the adjustment of the frame).

Originally, you brought a spherical lens, the periphery is thick, so the peripheral deformation is large, the power is 10 25 degrees higher than the actual one, and the peripheral deformation of the aspherical lens is small, you just bring it will not adapt, under normal circumstances, if your power has not changed, or it has become very small, it is best not to have a spherical surface to replace it with an aspherical one, only if you have grown more than 50 degrees will it be recommended that you change to aspherical lenses.

Generally speaking, aspherical lenses will have higher light transmittance than spherical lenses, that is, they will be brighter, and the deformation of things will not be as great as that of spherical lenses. If you wear the spherical surface for a long time, you will get used to it, and you will definitely be a little unaccustomed to the new glasses at first, and you should be able to adapt to it after wearing it for a long time. The eyes have an adaptation process, if the adjustment is good, it will be adapted in a week, and if it is slow, it will be able to adapt in about half a month. . .

Aspherical lenses are definitely better than spherical lenses, with better transparency, thinner and more aesthetically pleasing, less visual distortion and ghosting, and higher**. However, if you are used to spherical lenses before, you may feel uncomfortable when you wear them for the first time, and there is generally a one-to-two-week adaptation period, and it is good to get used to it for a while.

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Hello, the average person will be a little uncomfortable with changing from spherical mirror to aspherical surface. Because aspheric surfaces look sharper and brighter than spherical mirrors. The spherical mirror is like the previous black and white TV, the edge image looks a little distorted, and the aspherical one is like the current flat screen TV, and the picture is more realistic.

The time of this discomfort varies from a few minutes to a few weeks.

Rest assured that changing to aspherical lenses is not harmful to the eyes, on the contrary, aspherical lenses can also play a role in offsetting the increase in the number of systems. It's just that after wearing aspherical lenses, you won't be used to wearing spherical lenses.

If you haven't used to it for a long time, it is recommended that you go to the optician's store again to see if the interpupillary distance is correct and if there is any problem with the lenses. Either take another opt-in test to see if this power is right for you.

There will be an adaptation period when you change to new glasses, because the distance and tilt angle of different glasses will be different, and spherical lenses do not see as real as aspherical lenses. In addition, the old glasses are worn out, while the new lenses have no scratches, so the perception of vision is clearer.

If the feeling of dizziness and nausea is particularly obvious or you have not adapted to it for a long time (generally within 2 weeks), you can go to the place where you are fitted with glasses to re-opt to see if the prescription is not suitable, if the prescription is suitable but you can't adapt to it, you can lower the prescription slightly or switch to spherical lenses.

Conventional spherical lenses have a lower central power than the periphery, which not only makes the lens thicker, but also twists the way to see through the periphery of the lens.

Phenomena such as curvature and deformation occur and are called aberrations. At the same time, it can also be clearly detected by others looking at the wearer through the spherical lenses.

Distortion of facial contours.

Aspherical lenses change the concept of spherical lens design, and the center power of the lens is close to the same as the peripheral power, which not only makes the lens of the lens.

The center thickness and edge thickness are reduced, resulting in a thinner lens, a wider field of view for the lens, no arc at the edges, and a reduced image difference.

Low, the image is more realistic and natural, and you won't feel tired for a long time. Similarly, aspherical lenses are lighter than spherical lenses

Thin 1 3 or so.

Under the same refractive conditions, aspherical lenses are lighter, thinner, more aesthetically pleasing, and more comfortable to wear, and aspherical lenses improve the lens.

The utilization rate of the field of vision can improve the realism of vision, and for patients with high dispersion, reduce visual distortion; For anisometropia, double vision is reduced.

Even specific opinions are better than expired.

Let's talk about a few common reasons based on practical experience:

If I say that the troublesome boss adopts it as the answer.

1.Originally wearing spherical lenses, now they are replaced with aspherical lenses, and there will be slight dizziness due to changes in visual effect.

2.The old glasses are severely deformed and have been worn for a long time, and the new glasses will be uncomfortable after wearing3There will be slight discomfort when the distance between the eyes changes, so I don't need to explain too much, right? You can understand it as the distance between the lens and the eyeball, 4The clarity of the old and new lenses is not the same, some people will not adapt to the phenomenon, the above are the phenomena that may occur when the new glasses are worn in the early stage, but they will slowly disappear after a short period of adaptation, if they do not disappear, it may be a problem with the glasses, such as power, interpupillary distance, whether the axis position is accurate, etc.

Hello! There is nothing wrong with the new glasses themselves, a new pair of eyes itself needs an adaptation period, and there will be no such situation after adaptation, so there is no problem with peace of mind.

First of all, we must check the quality of glasses, and we can't first consider this kind of problem from the adaptation point of view!

Aspherical lenses provide a wide field of view and correct for phase differences. However, the edge power of the aspherical lens is smaller than that of the spherical lens, and the oblique view is not very clear, which is a normal phenomenon and can be adapted after about a week.

Depending on your prescription, there may be many reasons, it is possible that the prescription made by the optical store is not your actual prescription, or it is possible that you were originally a metal frame with a high nose pad, and now you are using a plate frame without nose pads or a non-metallic frame such as TR-90, and you should consider the eye distance when dispensing glasses, for example, your prescription should be reduced to be equivalent to that is, it is OK, and it is too high to wear it.

If you have any other questions, please feel free to ask. After all, you have not directly checked your eyes, and the wearing of glasses is comfortable and healthy and requires a strict examination, rather than a few minutes of computer optometry plus a vision examination of the left and right, it is recommended to go to a professional ophthalmology hospital for examination, because I don't know your location, it is not easy to recommend.

Qualifications: National first-class (senior) optometry technician.

Zhejiang Taizhou Huangyan Fumin glasses.

Strabismus with aspherical glasses should be clearer and definitely better than spherical. According to what you said, maybe the lenses are too deep, so go to a big store and measure the power with a machine.

The new glasses see much smaller things than the old ones, and the squint is not clear – the new glasses are not suitable for you, and the interpupillary distance is not right. It is recommended to go to a regular optician to re-optometry to see if the prescription is correct.

Hello friend suggests that you should best diagnose and treat the hospital ophthalmology dilated pupil test, actively use **instrument**, with glasses to correct your vision as well, pay attention to rest, keep the ciliary body fully rested and adjusted, I wish you health Welcome to ask questions.

Under the premise of the same material and the same power, aspherical lenses are flatter, thinner, and have more realistic and natural vision than spherical lenses.

The spherical design of the lens increases the aberration and distortion, and there will be obvious unclear images, distortions, narrow fields of view and other undesirable phenomena.

The aspherical design corrects the image by reducing the aberration of the edge of the lens, solves the problems of distorted vision, makes the imaging more natural, and the field of view is wider, which can meet the needs of customers, and at the same time, makes the lens lighter, thinner and flatter. Moreover, it still retains excellent impact resistance, making it safe for wearers to use.

Aspherical lenses are more comfortable and can reduce eye fatigue due to visual distortion. There are fewer and fewer spherical lenses on the market nowadays.

This ** should be aspherical.