The accuracy of optometry in optical shops is largely related to optometrists, who receive many customers every day. If she wants to buy glasses, she will be very happy. If she just wants to have an optometry, she won't get it done. In this case, the eye data she said is probably false. Of course, this cannot be generalized. There are also some optometrists who will give accurate tests even if they don't buy glasses.
Note: Don't choose a frame until you have the degree. Generally speaking, for low myopia, choose glasses frames according to your own preferences. For high myopia, it is recommended to choose small frames and thick frames. Regardless of the degree, after wearing the glasses frame, the geometric center of the glasses frame should coincide with or be as close as possible to the pupil center when farsighted. Nowadays, many girls like glasses with big frames, but the distance between their eyes is very small, which leads to the center of the pupil close to the inside of the frame.
Regardless of the appearance, it will reduce the optical correction effect and wearing comfort of the eyes. The higher the refractive index of the lens, the smaller the thickness of the lens edge. The choice of lens depends on the refractive index, and it is highly recommended to choose a higher refractive index. It is enough to choose low refractive index for low myopia, and it is not necessary to choose high refractive index lenses. Nowadays, many lenses have various functions: anti-blue light, high definition, and can also be selected according to their own needs.
If you want to know what you need to open an optical shop, first of all, most entrepreneurs learn technology by themselves, and then get relevant qualification certificates. Where to learn technology? How long will it take? Training institution or optical shop? All these need to be thought clearly and made a good choice. If you want to know more, you can click to open an optical shop as your boss and take you to know more about it.