How to choose sunglasses and maintenance

Selecting sunglasses go to the professional formal shop
1, sunglasses easily to dust and dirt, as the lenses if there is a stain, grease or fingerprints, a soft cotton cloth or special lens paper wipe or rinse with a professional cleaning agent, it is best not to hand or nail polish to remove stains on the lens. Special Note: the glasses use polarized lenses cannot be used ultrasonic cleaning, otherwise it will undermine the polarizing effect;
2, would be inappropriate to make sunglasses on your head, so as to avoid bad linking. Do not wear should be careful when removing, placing to glasses when folded, and the mirror on, avoid the lens facing down.
3 use wipe when you are finished, sunglasses, glasses should be mounted in the bag for keeping do not store with hard or sharp objects, so as to avoid scratching the lens or topcoat;
4, avoid placing the sunglasses long in high temperature environments, such as sunglasses, throw in the car on the dashboard, sunglasses may heat deformation, temperature is too high the sun glasses may be distorted, especially plastic framed sunglasses almost all is not heat-resistant.
5, to avoid exposure to perfumes, insecticides, items containing chemical substances, in order to avoid chemical corrosion on lenses, frames, better protection of glasses;
6, adhere to hand pick wear glasses, pick with one hand if too much force when you wear may lead to frame deformation, fracture;
7, unused for long periods of time, glasses bags sunglasses should be placed on a dedicated;