Disadvantages of pure titanium frames
The material is soft, the glasses can not be made more delicate, only the lines are thicker, in order to ensure stability and strength.Usually, when you are not wearing a pure titanium glasses frame, it is better to put them in the case of glasses, to avoid pressure deformation.
Anti Fog Safety Glasses Safety Goggles Over Glasses
Anti-fogging safety glasses reduce deformation, effectively prevent fogging, and avoid fogging which affects vision in use. The angle of the goggles can be adjusted in accordance with the different foreheads (30 degrees). They can use a variety of large-size myopia goggles, safety glasses. It can effectively protect eyes from saliva, sand, metal fragments, and so on.
Have regular professional examinations.
The rimless glasses frame is directly punched on the lens and fasteners are added to fix the lens. It is easy to loosen the lens after long-term wearing. Therefore, it is recommended to regularly check and correct the glasses in the store when wearing rimless glasses. If the protective nut of rimless glasses falls off, stop using them immediately and repair them in time before wearing them. If screws and other accessories are loose, etc, be sure to go to the optical shop by the professional processing division to adjust.
The frame materials
You should choose the driver's glasses with alloy materials. The glasses made of this material are light and strong, so your ears won't be uncomfortable when you wear them for a long time.
The inadequacies of bifocals
The field of vision is smaller than that of the single vision lens, especially for the close view. For example, reading and reading newspapers need to make it coordinated with the head movement, there are optical defects of image jump and image displacement. There is a boundary, and it is easy to be seen that wearing a bifocal lens exposes age. Bifocals clearly demarcate the near and far regions, affecting appearance and vision. And when far view and close view change, the objects will jump. Because most myopic patients have a lag in the adjustment response, wearing bifocal lenses not only does not delay the development of myopia but has side effects. Therefore, bifocals are not suitable for teenagers to control myopia, and only a few special patients need to wear bifocals.
How to clean a contact lens case?
Avoid cleaning contact lens cases with running water. Tap water contains a number of chemicals that can be harmful to contact lenses, as well as microorganisms such as bacteria. Please rinse and disinfect with boiling water. Use contact lens solution before cleaning. Let it dry. Make sure the contact case dries naturally before you use it. Stay away from cosmetic bags. It is to avoid that your contact lens case is contaminated by cosmetic bags. Some dust from cosmetic products can easily contaminate contact lens cases, so stay away from cosmetics.
Why are some glasses expensive and others cheap?
Lenses do not regulate vision, but some progressive lenses can help the ciliary muscles to adjust. The quality of the lens is mainly determined by the transmittance, the surface, the aspherical surface, the refractive index, the coating quality.
The higher the refractive index, the thinner the lens, and the more expensive the price, for some people with high degrees, the lenses also play an aesthetic role. Commonly used are green film, and some are purple film, gold film, etc. How much cheaper is a relative number, and there are many other factors to consider besides price.