Advantages of progressive multifocal lenses
The progressive multi-focal lens has a number of different focal points from top to bottom. There's a smooth transition between seeing far and seeing close. There is no clear dividing line in the middle, like the myopia glasses, quite beautiful, and it is not dangerous. Because the added value is continuously and slowly increased in the gradient area, the wearer can get a continuous clear vision from the far point to the near point through the progressive lenses with the appropriate head position. In line with physiological optics, They help a better adaptation. Since the lens degree changes little by little, there is no phenomenon like jumping. Because the degree of the lens is gradual, so the vision from far to near changes slowly increase, which will not produce the adjustment of the eye fluctuation. It is not easy to cause visual fatigue. Without a degree line, the appearance will be more beautiful. Clear vision can be obtained at all distances within the visual scope. A pair of glasses satisfies both close and middle distances.
What is an eyewear chain store?
Eyewear chain is a retail company that operates the same kind of eyewear products or services by its branches under the leadership of the core head store or head office. It is an economic union organization form that achieves scale benefits through standardized operation and management. Among them, the core company is called the headquarters, and the main store or the scattered operation company is called the branch store, the store, or the member store. It is one of the most popular modes in the eyewear retail industry to adopt the mode of chain and scale operation.
What is the best lens material?
Crown glass was first used to make lenses. The glass melt was blown into a crown, or hollow sphere, and then reheated in the center of a rapidly rotating plate, which was then unrolled and flattened by centrifugal force. Flat and thin edges are cut into suitable shapes to make window panes. The circular bulge in the middle is the prototype of the lens. The glass material used to make lenses was originally colorless transparent glass with a refractive index of 1.523. Other substances were added to the lens to improve its ability to absorb ultraviolet light.
About the early domestic anti-reflection coating lens
Chinese coated lenses appeared in the mid-1980s. At that time, Europe (such as France and Germany) and Asia (such as Japan, Singapore, and Taiwan) had already launched coated lenses to the market, and the grade of lenses was evaluated based on the quality of the anti-reflection effect. Among them, Germany and France were the two leading countries in technology. Technically, the use of French original film material (referred to as H2) can reduce the effect by 99.98% (refers to the light transmittance, the same below). Almost you can not see the reflection, but the material is expensive. Therefore, the coating lens which is currently used in the world is born. The anti-reflection effect is controlled at about 98%, so the coating cost is greatly reduced. And it is accepted by consumers because it presents various colors, especially green. At the same time, because at the same time, it can be easily distinguished from non-coated lenses. It can reflect the high-grade film lens, and it is accepted by the sales staff.
The classification is different.
Acetate frames can be divided into two kinds, one of which is the lens using acetate fiber processing of plate cutting. The other is the injection frame. It uses acetate fiber particles. Acrylic acid is a kind of unsaturated organic acid, which can be derived from a series of compounds to form a large class of acrylic products. Acrylic acid downstream products contain common acrylate and special acrylate. It has the characteristics of heat resistance, weather resistance, aging resistance, strong adhesion, water resistance, acid and alkali resistance, stickiness resistance, and environmental friendliness.
Proper massage can not only relieve the fatigue of the skin that supports glasses but relax the eyes. Take time each day to gently massage the marked area of the nose pad for ten minutes. Try not to wear glasses all the time. You can switch between contact lenses and glasses. In this way, over time, the nasal plate marks will gradually disappear. Hot towels can be used to warm the skin, which is helpful to blood circulation to the skin and slowly eliminate indentation.
Are blue light glasses good for driving at night?
Are blue light glasses helpful when driving at night? The answer is not necessarily. Anti-reflective coating on glasses is beneficial. But blue light blocking won't have any effect on your driving at night. If your glasses have an anti-reflective coating, then they might be helpful for night driving. Otherwise, they won't have any impact.