Which Glasses for Computer Are the Best?
There is no such a thing that one type of computer glasses can fit all or is the best for everybody. When selecting glasses for screen protection, the visual ability, personal preferences, the type of work, the distance between the computer user’s eye and the monitor, and other factors should also be considered.
Disadvantages of Metal Frames
Metal frames may cause the skin to be sensitive easily. Generally, if the skin allergy to metal, they can choose titanium, but the price is pretty expensive. It may cost thousands of yuan. The frame of the other alloy is not too expensive. Sweat will make the screws and temples of the metal rust, affecting the appearance, which is bad for the skin.
Progressive lenses and single vision lenses
Single vision lenses are the most widely used optical lenses and are suitable for the general population.
Progressive lenses are suitable for below people.
① Myopia control lenses for teenagers. Progressive lenses are used to relieve visual fatigue and control the development speed of myopia.
② Anti-fatigue lenses for adults. Progressive lenses are used for teachers, doctors, people who use too much computer at close range to reduce visual fatigue caused by work.
③ Progressive lenses for Middle-aged and elderly people. A pair of glasses for middle-aged and elderly people to easily see near and far.
What diopters do rimless myopic glasses suit?
What diopters do rimless myopic glasses suit? It suits myopic diopters to be used by people with diopters of 600 or less than. Usually, the high diopters are 500, 600, or above, Rimless glasses can see the lens directly. The higher the diopters, the thicker the lens. Secondly, in rimless glasses, sunlight can shine in from the axis of the lens, resulting in a dispersion effect, which has a certain impact on viewing. Thirdly, rimless lenses, without the protection of the rim, are easy to be scratched and broken, so they need to be carefully protected and stored. So to sum up, people with the diopters of 500 or 600can choose myopia rimless glasses. But it is not recommended to choose rimless glasses for people with diopters of more than 800.
Disadvantages of Plastic Frames
The disadvantage of injection molding material is that most of them have surface spray paint processing. They are not wear-resistant, easy to fade, easy to peel off the paint layer. PC material comfort is poor, and durability is not good. The frames cannot be changed to suit different face shapes. Because of its good elasticity, TR material can not be changed, which means that poorly made lenses are easy to fit into the frame. Plate material is hard, if the change is not appropriate, it will be not comfortable. Acidic material can not match the lens made of PC material, which will cause the lens to crack.
The function of eyeglasses cloth
Under a powerful microscope, the fibers of the cloth are more closely arranged than those of ordinary cloth, and the material itself is softer than ordinary cloth. That's because eyeglasses under the eye are almost always coated, with each standard lens having seven layers of different functions on the front and back surfaces, to extend lens life. It can thoroughly remove the stubborn stains left on the lens to make the picture clear. It can clean all kinds of glass, resin, and other materials of glasses, glass mirrors, and other mirror surfaces, remove stains, and grease absorption.
Is titanium alloy necessarily worse than pure titanium?
In the common case, the introduction of a titanium frame will have a detailed material label, what titanium and what material is it made of, such as titanium nickel alloy, titanium aluminum vanadium alloy, and so on.
The composition of titanium alloy determines the quality and price of the frames.A good titanium frame is not necessarily worse or cheaper than pure titanium.It is difficult to ensure the quality of titanium alloy which is very cheap in the retail market.In addition, titanium alloy is not to reduce the cost, but to improve the performance of the material.Usually, the memory frame on the market is made of titanium alloy.
