First, accurate optometry:
Optometry at least includes computer optometry, comprehensive optometry and insertion test. Coupled with the measurement of the parameters of the old mirror, the whole process should not be less than 30 minutes.
If you are wearing contact lenses, you should do a slit lamp inspection and measure the curvature of the substrate with a curvometer.
Second, the choice of frames:
1, what are the inferior frames?
The quality of the frame can be seen from the appearance. After all, it is an article that touches the skin and needs a smooth and detailed surface.
2. How to choose a frame?
The best way, of course, is to try it on more. Intuition is more direct and reliable than trying on. Spend more time and you will always find a style that suits you.
In addition, in the case of comfort and beauty, the size should be as large as possible, so that the field of vision will be larger. However, some optometry parameters limit the choice of frames. For example, if the pupil distance is very small, it is not suitable to choose too large a size.
Try not to choose products with painted surfaces, which have a short service life.
It is important to note that the legs of TR, plastic steel, stainless steel, wood and β titanium cannot be adjusted. When trying on glasses, pay attention to the fact that the weight of the lens is not added, so as to avoid uncomfortable problems after preparation (such as the glasses frame is easy to slide).
Third, the choice of lenses.
1, according to the refractive index:
Because the higher the refractive index of the lens, the thinner the lens but the higher the price.
2, material selection:
Glass sheet: At present, the utilization rate is low, and the factory mainly makes high refractive index, such as refractive index 1.8 and 1.9.
Resin sheet: at present, it is still the most mainstream material, and the hardness is higher after surface strengthening. Definitely not as good as glass lenses.
PC film: The domestic maturity needs to be confirmed, but its lens is light, tough and unbreakable.
Guidance: Myopia below 300 degrees does not affect vision. Glasses are not recommended. Especially/kloc-children under 0/8 years old.
/kloc-Children under the age of 0/8 are nearsighted. It is recommended to take Le Jing Mingmu Nutrients, two packs a day, and the changes can be seen in about a week. If you persist in taking it for a period of time, your myopia will decrease and your vision will gradually improve. And it won't rebound.