Early beautiful glasses frame material is mainly made of metal and tortoiseshell, stainless steel, titanium, nickel alloy Sims, plastic and Model, nickel alloys and other materials. Frame on the technology and application materials are also many breakthroughs memory alloy frame glasses, can maintain its shape, even buckling will not break, so the Fake Oakleys Frogskins Sunglasses Cheap for Sale glasses with more than a longer life, the frame also avoid breaking the inconvenience. In the twisted bit frame glasses arms to join spring also contributed more durable. The titanium frames made of metal, the lighter, more resistant to corrosion, avoid long-term wear due to corrosion of metals sweat and lose luster. Mandatory national standards are national standards to protect human health, personal and property safety standards and laws and administrative regulations enforced; recommended national standard means of production, exchange, use, etc., through market regulation and economic instruments or voluntary adoption of national standards. However, a voluntary national standard adopted by the acceptance, or the parties agreed to the contract agreed to include the economy, to become parties must abide by the technical basis of a binding law.
Resin lenses is generally much lighter than glass lenses, and superior impact resistance of glass, but lower surface hardness, it is easier to be scratched. Resin lens and lens coating because of its characteristics is relatively soft, so be careful not to let the mirror usually in direct contact with a hard object, when it is best to wash with water scrub, then use special high-quality cotton cloth or dry test glasses of water droplets on. In addition, poor environmental conditions where coated lenses should be used with caution, so as not to dirty the difficult to clean. When choosing eyeglass frames, in addition to price, other than as a standard appearance, with particular attention to the selected frame size and I try to match the IPD, because it directly affects the intrinsic optical quality Tiffany and Co Heart Necklace Jewelry Outlet glasses and wearing comfort.
Recognition of the quality of the main frame can be considered a good frame elastic good general quality. Better quality frames smooth and glossy coating. Smooth joints, preferably small and uniform quality frames. Tightly assembled parts were as good. Frame is part of a modern fashion, and not just medical devices. Optician who wear glasses, do not want to expose their faulty, but to frame can play a decorative role, to cover up the shortcomings, highlighting the advantages. The main skeleton structure geometry determined according to the face. The classification is not absolute, concrete face shape and each of these may vary, but for the analysis of face, choosing the right frame is helpful, highlighting the advantages conceal shortcomings, giving the feeling of symmetry and balance. For example, a square face shape wear circular frames can eliminate the feeling of too obvious edges and corners, the same angular, square frame will add a sense of circular face.
For example, plump man wearing clothes bars appear slim, wearing clothes bar will be fatter. People face more round than the straight hair is often increased sense of contour, rarely hot curls. Plus a basic principle of choice is the width of the Cheap Ray Bans Wayfarer 2140 Sunglasses Outlet frame and the temporal width of the frame basic line, the frame is too wide would be too cumbersome and would increase the lens aberrations. Square face is relatively short, more prominent jaw line and angular. We note that the characteristics of the two face of the square, using a circular frame, particularly the bottom of the circular edges of the frame to reduce the feeling of too obvious. This method is the most important, Choose a smaller frame height, frame height is too large to account for most of the face and people feel this face shorter; If possible, choose a higher position temples Frame, and the face will seem longer.