1. The color selection of polarized sunglasses should be based on the principle that the color of the surrounding environment is not distorted, the edge of the object is clear, and the signal lights of different colors can be effectively identified. Especially when driving sunglasses, to ensure driving safety. The color of the lens is…
Sunglasses buying skills First consider quality The primary function of polarized sunglasses is to prevent ultraviolet rays and filter polarized light. Good polarized sunglasses lenses can block more than 90% of the penetration of ultraviolet rays. You can choose polarized sunglasses with “UV400” best UV blocking logo; inferior polarized sunglasses, such as dark sunglasses, as…
Precautions for the use of polarizer lens 1. There are two types of polarizers, linear polarizers (linear polarizers) and circular polarizers (circular polarizers). The method of use and the effect are the same; but circular polarizers can make light go through the filter in a circular direction instead of a linear shape, which is especially…
What are the applications of sunglasses? What are the applications of sunglasses? Sunglasses are not only required to be worn in summer, in fact they must be used throughout the year. Wear it on sunny days and also on cloudy days. Don’t think that the sun is not strong on cloudy days and the weather…
What are the characteristics of polarizer lens? Although polarized lenses can filter out a lot of irregular light interference and avoid glare, glare, etc., if the curvature of the lens itself cannot be in the optical standard refractive state, the polarizing effect will be weakened, affecting the authenticity of the image, and poor durability .…
The polarizer is a lens manufactured according to the principle of light polarization. It is used to eliminate and filter the direct light in the beam, so that the light can be input into the visual image of the eye on the transmission axis of the normal track, so that the field of vision is…
The computer optometry developed in the 1970s to the present day belongs to the objective optometry method. The machine used for this optometry is a combination of optical, electronic, and mechanical instruments, and its principle is basically the same as that of the retinoscopy method. In addition, an infrared red light source and an automatic…
The glasses worn by children have a therapeutic effect on the eyes and also have a certain cosmetic effect. Whether the frame size is appropriate or not is directly related to the improvement of children’s vision and visual development. According to children’s lively and active characteristics, the frames are mostly made of plastic or plexiglass.…
How to maintain sunglasses in daily life? The dazzling sunglasses make you active in the sun, so free. In fact, sunglasses can block the sun, but can’t block the pollution damage, so take care of them carefully to avoid losing face. In fact, the method of maintaining sunglasses is like maintaining ordinary glasses. You must…
Modern spectacle frames are part of fashion, not just medical instruments. Wearing glasses, the spectacles do not want to expose their faults, but hope that the frame can play a decorative role, conceal the shortcomings, and highlight the advantages. According to the geometric shape determined by the main skeleton structure of the face, the face…
Optical glasses use lenses, prisms, contact lenses, artificial lenses, etc. to correct vision, eliminate visual fatigue, and protect or treat eyes. There are many types of glasses. There are optical glasses and contact glasses for correcting refractive errors. In addition to contact glasses, intraocular lenses can be implanted for correcting aphakia. In addition, there are…
Blue goggles There are two kinds of this kind of glasses, one is colored iron oxide and cobalt oxide, and the filament is purple red with it, and the other is colored with copper oxide and manganese oxide, and the filament is white with it. They can all absorb the dazzling glare in the 500-600nm…
Absorptive filter, because the lens absorbs some light, it turns into heat and emits heat, especially infrared rays and other light with longer waves. The accumulation of heat makes the eyes feel very uncomfortable. If a reflective filter is used, this problem can be solved well. If the surface of the lens is coated with…
Classification of absorption goggles Absorption filters use lenses to absorb certain wavelengths of light to reduce the intensity of light entering the eyes. Sun glasses There are light green, light gray, light tea and other colors, used to make sun-shading and snow work protective glasses. Among them, light gray lenses have the least effect on…
In the box method, it is the difference between the horizontal size of the circumscribed rectangle. Therefore, LSWF should indicate whether it is the box method. Determine the LSWF, find the geometric center of the frame or the cut lens that conforms to the shape of the frame, which is the M point in the…
The size and shape of the goggles lens that conforms to the shape of the frame after processing the raw film naturally depends on the curve of the inner edge of the frame. The lens should indicate the horizontal direction and the nasal side, otherwise the asymmetrical lens will become a completely different shape after…
Goggles coating classification The blue coating can filter out electromagnetic waves to a certain extent. However, studies have shown that blue light in visible light can cause retinal damage, which is a major factor in macular degeneration. Blue coated lenses are powerless against blue light with the most energetic wavelength of 380nm-450nm in the visible…
Features of computer goggles The anti-radiation lens of computer goggles can not only effectively absorb harmful electromagnetic radiation emitted by TVs and computers, but also provide comprehensive protection for your eyes. It also reflects fashion, beauty and personality. 1. The lens is a flat lens, which has no side effects on vision. It is refined…
Eyes are the most important of human organs. You need your own cherishment. Don’t let inferior products hurt your eyes and ruin your future! 1. Please try your best to use anti-radiation glasses when you are looking at the computer. You don’t need to wear them when you walk or go out. 2. When wearing…
Features of computer goggles The anti-radiation lens of computer goggles can not only effectively absorb harmful electromagnetic radiation emitted by TVs and computers, but also provide comprehensive protection for your eyes. It also reflects fashion, beauty and personality. 1. The lens is a flat lens, which has no side effects on vision. It is refined…
