I. Characteristics of the glasses
The large glasses operate in a very wide range and in a variety of different types, such as crocodile, tolik, sunglasses, pancolour lenses, various protective lenses, etc. Mirror frames, metal, plastic, wood, etc. Mirrors of various types: they include colour-changing mirrors, haloscopes, contact lenses, lenses, magnifying glasses, telescopes, sunglasses, etc. The lenses of the same type of structure have different structural characteristics and there are some differences in the context in which they are used. The mirror frames of the various configurations of the glasses are described below。
1. Full framework
The mirror frame with the full lens is the full frame. The overall framework is robust and suitable for athletes and children, and because the lens perimeter is fully protected by the lens, it is suitable for lenses with various parameters。
2. Half-box
The upper part is made of metal or plastic materials, and the lower part of the mirror is made of a very thin nylon (raz) as the lower part of the mirror. The lens is required to have a certain edge thickness in order to leave some lens thickness on both sides of the sink to maintain sufficient strength。
3. No frame
It is divided into parts and one. The spare parts consist of a nose beam (with nostrils) and two mirror legs (with stakes) to the left and to the right; the integrated form is connected with mirror frame material between the nostrils and stakes, integrating the nose beam and mirror leg, but there is no link between the material and the lenses, which appears to be between semi-frame and unframed。
4. Combination frame
Such mirror frames are divided into two sets of mirrors, usually preceded by coloured lenses, which are then assembled for correction of poor light. The outdoors are equipped with two sets of lenses, which are protected by sunglasses and provide a clear vision. During indoor use, front lenses can be flipped or removed, providing some ease of wearing sunglasses for patients who have suffered from poor dyslexia through frame glasses. The presence of two pairs of lenses has increased the weight of the glasses, affecting the comfort of wearing them; on the other hand, due to the limitations of structural space, patients with very thick lenses have to choose carefully。
5. Collapse
These mirror frames are typically folded at the nose and legs of the nose, reducing the space occupied by the storage or bearing of the time frame, and are used to produce older mirrors。
Ii. How many glasses do you have? Money
The price of the glasses is around $500, and generally a little better is about $300. Or the progressive lens is a little more expensive, and then it's the ordinary 200-dollar shelf, and it doesn't work. It's usually about three days, and there's more money to work. There's a branch in the big glasses. His glasses are expensive! It's a big deal
