Take the right size
You will find that there are a variety of eyeglasses frames. Even if the eyeglasses look the same online, the effect of wearing them will be very different in different sizes. So if we want to choose glasses, we should try to do the measurement of the size, the width of the face, the distance between the eyes, and so on. We can calculate the size of the glasses to make sure the style fits your needs.
Which sunglasses are best for driving, polarized sunglasses or non-polarized sunglasses?
Polarized and non-polarized sunglasses are the same in the ability to protect against ultraviolet rays. But when you work as a driver, in addition to the front of the sun, sometimes there are highway road reflective lights, other car body reflective lights, and so on. Glare will make people's eyes uncomfortable and fatigue, and affect the clarity of vision, stimulating the eyes. Polaroid lenses can filter out light from different angles, so when you driving, is best to wear polarized sunglasses.
Advantages of progressive lenses
1. The appearance of the lens is like a single vision lens, and the dividing line of the degree change cannot be seen. Not only is the appearance beautiful, but more importantly, it protects the age privacy of the wearer. There is no need to worry about leaking the age secret due to wearing glasses.(https://www.koalaeye.com/collections/progressive-glasses)
2. Since the change of lens power is gradual, there will be no image jump. It is comfortable to wear and easy to adapt.
3. Because the degree is gradual, the replacement of the adjustment effect is gradually increased according to the shortening of the short distance. There is no adjustment fluctuation, and it is not easy to cause visual fatigue.
4. Clear vision can be obtained at all distances in the visual range. A pair of glasses meet the use of long-distance, near use, and various distances in between. It is especially good for teachers, doctors, music workers, and computer operators because these people not only need to see far and near objects clearly, but most of the time they also need to be able to see objects at intermediate distances such as blackboards, piano scores, and computer screens. This is not possible with lenses other than progressive lenses.
5. At present, both internal and external ophthalmologists agree that young people should wear low-degree convex lenses when reading and writing to reduce near-use adjustment, thereby alleviating or preventing the occurrence and development of myopia. This gives the progressive multifocal lens a new meaning and mission. Physiology found that excessive use of the eyeball adjustment function can form 'accommodative spasm' or pseudo myopia. Continued development can produce longitudinal eye axis elongation and induce 'true myopia' or axial myopia. The external luminosity of the progressive lens can be artificially added to the progressive luminosity. The upper is used for looking far, and the below is used for looking near, which makes the eyeball relax and over-adjust. The ever-changing luminosity of the lens replaces the 'accommodative power' that should have been activated, blocking the vicious circle of adjusting the eye axis elongation, making the eye not easy to fatigue, and slowing the development of myopia.
Semi-Rimless Frame Glasses
Half-rim spectacle frames replace part of the spectacle frames with nylon wire, giving people the feeling of bottomless frames. It is lighter and looks more chic and firm. If you are a highly myopic friend, choose a pair of half-rim glasses, which can not only reduce the load on the bridge of your nose but also look more fashionable. Half-rim glasses are the first choice for men in the workplace, and they are more mature and stable.
Myopia Glasses
Glasses are lenses used to correct vision or protect eyes. It is not only an eye protection product but also a cosmetic decoration. Nowadays, there are more and more varieties of glasses, and the classification is getting more and more detailed. In addition to myopia glasses, reading glasses, and sunglasses, it also includes driver protective glasses, computer protective glasses, leisure goggles, and sports goggles, which are suitable for special industries, special work, and leisure and entertainment. Moreover, the progress of the times promotes the maturity of people's consumer psychology. Consumers pay more attention to the diversification and individualization of products. The demand for glasses has risen from a single level of vision care to three-dimensional consumption spaces such as humanities and aesthetics. This will stimulate the research, development, and sales of new varieties and new styles of glasses, and bring new opportunities for the development of the glasses retail industry.
Myopia glasses mainly include frame glasses and contact lenses. With the increasing demand for glasses by people who love beauty, myopia glasses have begun to combine the beautiful nature of sunglasses, and many new products have come out. The addition of contact lenses can be regarded as a supplement in terms of myopia glasses. The popularity of contact lenses has a sufficient reason that it eliminates the trouble of frame glasses, does not affect the appearance, and the feeling of seeing objects is more three-dimensional.
The Cons of Titanium Glasses
However, there are some negative voices of titanium glasses. Titanium glasses are more expensive than other materials. So, when purchasing titanium glasses, beware of the differences between pure titanium and titanium alloy.
Refractive index of spectacle lens
It is generally believed that the higher the refractive index, the better the spectacle lens. Such spectacle lenses are relatively thin, and of course, the price is a bit expensive. When the refractive index increases, the direction of the light entering the lens will change greatly, the focus will move to the lens, the focal length will be smaller, and the diopter will become larger. In order to keep the diopter unchanged, it is necessary to reduce the curvature of the lens, that is, to reduce the curvature of the mirror surface, so that the thickness of the lens can be reduced. This is why the larger the refractive index, the thinner the lens is. Under the same premise of other things, the larger the refractive index, the thinner the lens, the lighter and more beautiful the lens, and the higher the price, but the larger the refractive index is not the better.
