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…
Lens type 1. Anti-reflective protective lens This kind of lens is coated with a thin layer of magnesium fluoride on the surface to prevent the reflection of strong light, so that you can see things more clearly and not be disturbed by strong light. 2. Colored lenses Also called “tinted lens”, it is to add…
What is antique glasses? Antique glasses refer to the old-style glasses made by hand and assembled in one piece. The glasses produced by the current mechanical assembly line are not included in this list. The glasses are imported. According to research, the earliest spectacles appeared in Italy. The first portrait of a person wearing spectacles…
Commonly used glasses mainly use lenses, prisms, contact lenses, etc. to correct vision to achieve the purpose of eliminating visual fatigue and protecting or treating eyes. There are many types of glasses. Optical glasses and contact glasses are mainly used to correct refractive errors. Correction of myopia: A concave lens with proper focal power should…
The origin and development of glasses In 1268, Roger Bacon first recorded the lens used for optical purposes. In Europe, the first glasses appeared in Italy and were introduced by Alessandro di Spina of Florence. The first portrait with glasses, “Hugh of Provence”, was painted by Tommaso da Modena in 1352. It is said that…
Physical properties of glasses Transparency refers to the clarity of a substance. It is a comprehensive manifestation of material chemistry, purity, hydration and other factors. Usually, light of a specific wavelength is used to express the transparency of a substance by the percentage of the transmittance of a substance sample. The hardness of the material…
Basketball glasses On the sports field, have you ever experienced or seen a scene where the eyes are injured due to body collision or external force? Especially in some competitive sports, due to the fierce resistance of limbs and sports equipment, any small negligence and unintentional collision may cause permanent damage to the eyes. characteristic:…
Rear view reflective glasses A special kind of glasses. The front view is no different from ordinary glasses. After wearing, you can clearly see the situation behind you through the outside of the lens, so that the detective can look forward and backward easily and beware of being counter-tracked. As far as tracking and monitoring…
Use and maintenance of Sunglasses 1. Newly purchased sunglasses must be adjusted by the staff and worn comfortably before leaving. Please fold the left temple first when you close the lens. 2. When wearing glasses, please grasp the temples with both hands and take them off from the front. 3. Wrap it with a lens…
Color changing sunglasses Many car drivers often wear a pair of black glasses when driving. When driving in the sun or snow, this pair of black glasses can protect the eyes from the long-term irritation of strong light. However, when the car suddenly drove from the light to the dark, wearing black glasses became a…
