Why can the glasses of new match wear giddy disgusting?

summary

I'm very lucky that I'm only slightly short-sighted at the age of 20. But because I was too lucky, I went to an optical shop in the town to match a pair of glasses. Since wearing glasses for more than a month, I often had inexplicable eye pain, dizziness and nausea. Why can the glasses of new match wear giddy disgusting? Let's talk about it.

Why can the glasses of new match wear giddy disgusting?

First: new glasses will make you dizzy. Maybe there is something wrong with optometry and glasses. Some people still feel dizzy after wearing new glasses for many days or even half a year, and even have higher and higher myopia. After wearing glasses, they often have headache, nausea, vomiting, inattention, neurasthenia and other symptoms. This may be caused by inaccurate optometry and unqualified glasses. This is because the simple computer optometry can not accurately reflect the degree of glasses of myopia. Myopia patients with glasses, not only simply check the degree of myopia, astigmatism, but also check whether there is eye disease, binocular vision balance, single vision ability, the main eye discrimination, pupil distance and many other professional examinations. Regular medical optometry is a rigorous and complex process, which should be based on the comprehensive function of the human eye. In addition, the parameters such as vertex power, pupil distance and axial position of cylindrical lens must be consistent, otherwise, the effect of corrected vision will be directly affected, and the visual fatigue of users will be caused, which will aggravate the visual loss.

Second: new glasses will make you dizzy. Maybe old glasses "transform" your eyes. Some myopic patients with optometry and processing all data are accurate, the glasses are also in line with the optometry prescription, or the new glasses and old glasses have the same degree, but the new glasses will still be dizzy. This is because the old glasses have "transformed" their eyes in the process of long-term service. The old glasses used by some people have been seriously deformed, and the legs of the glasses are not in the same plane. The optical center area of the lens will deviate from the pupil distance measured by the glasses at that time, and the eyes gradually adapt to this kind of deviation. In addition, in the process of using the glasses, due to absorbing ultraviolet light, contacting greasy, dry rubbing And so on, the lenses will turn yellow and have scratches, so the clarity will be affected naturally. Even if the power of the new glasses is the same as that of the old glasses, the new lenses will feel brighter. Comparing the two will produce symptoms of discomfort. It is suggested that the new glasses can be used in the morning of the next day. After a night's rest, the eyes will be easier to adapt to the new glasses. Under normal circumstances, new glasses generally need about a week to adapt to the period, continuous wear for a few days, dizziness symptoms will disappear.

Third: the new glasses will be dizzy, or because the style of glasses has changed. The structure of new glasses and old glasses may not be the same (half frame, no frame, full frame), and the angle of glasses may not be the same, which will cause visual differences and dizziness after wearing new glasses. I used to wear rimless glasses or half rimmed glasses before. If I change to full rimmed glasses, I will feel that my vision is limited and I will not adapt to the rim of the glasses. If I change to half rimmed glasses before wearing full rimmed glasses, I will also feel that the rim of the glasses is too bright.

matters needing attention

There is another case, from the spectacles with nose support to the spectacles without nose support or the plate spectacles frame, because the distance between the spectacles and the eyes has changed, the same degree, the closer to the eyes, the clearer, on the contrary, it will feel fuzzy. In this case, you can fine tune the nose support, or after a short period of adaptation, it can generally return to normal.