Is there a standard for lens material selection?
No, again, according to your needs and budget. The materials of lens mainly include glass and resin, among which resin materials are divided into thermoplastic materials and thermosetting materials, respectively represented by PC and CR39. Different from the lens frame, the lens market choice is more uniform. And in recent years, resin lenses do better and better, most people choose thermosetting resin lenses.
Silhouette Rimless 5541 TMA The Icon II
Silhouette Rimless 5541 TMA The Icon II is an example of an innovative rimless frame structure. The unhinged temple is gently rounded to match the shape of the head for a comfortable, safe fit. Made from not heavy, hypoallergenic titanium, the glasses are strong enough to embrace the most active lifestyle while maintaining a stylish look.
Glasses are frequently replaced.
In the United States today, there are more glasses than people. Counting prescription glasses, sunglasses, and over-the-counter readers, there are now more than 400 million pairs on the market. According to the Vision Council, an industry group, they swap out a brand new pair of glasses every two years on average.
Color process of Contact lenses
Pigment printing process
It refers to the direct printing of pigments or patterns on the inside of the lens and then drying, which is the main production process of poor-quality chromatic contact lenses. Usually, small factories and small workshops use this method. The lens is being phased out because the pigment can easily seep out from the surface during wearing, causing discoloration and staining, and irritation to the eyes, which is a big risk.
Pigment build-in process
To be specific, the lens made by sandwich technology is a three-layer structure, the front and rear are colorless transparent layers, and the middle is a colored layer. After the processing of sandwich technology, the color layer is wrapped in the middle of the front and rear transparent layer, so that the pigment will not contact the eyes, which will not cause irritation and injury to the eyes. The downside of this process, however, is that the lenses are slightly thicker than normal contact lenses and are less oxygen-permeable, so they are not suitable for long-term wear.
The pressed film manufacturing process
This is a relatively new method of a similar sandwich process, and the color (pattern) is also made between the front and rear layers of the lens. But the color (pattern) is used to fill in the film process. During lens curing, the pigment seeps into the material instead of sticking to the surface. It feels as if the lens is covered in color within a single layer. This reduces the middle layer and makes the lens thinner, which naturally makes it more comfortable and permeable to oxygen.
Application of titanium alloy
Titanium alloy is mainly used in aircraft engine compressor parts, followed by rocket, missile, and high-speed aircraft structural parts.By the mid-1960s, titanium and its alloys were already in common industrial use, making electrodes for industrial electrolysis, condensers for power stations, heaters for petroleum refining and seawater desalination, and pollution control devices.Titanium and its alloys have become a kind of corrosion-resistant structural material.In addition, it is used to produce hydrogen storage materials and shape memory alloys.
How To Use Contact Lens Correctly?
Check your eyes for abnormal cases. Do your eyes sting or dry? If so, it is recommended not to wear contact lenses for the time being. Look in the mirror to see both eyes carefully, if it is red and swollen or if is both eyes full of bloodshot? If you do, you can no longer wear contact lenses, and you can go to a professional store for inspection. After putting on the contact lenses, block the left and right eyes respectively to see if the vision of one eye is clear. If the eye vision has decreased or blurred, check if the lens is dirty. If the lens is still the same, you should go to a professional store to find out the reason.
Occasions for browline frames
Whether classic or elegant, browline frames are more formal than other vintage style frames (such as Aviator or Wayfarer). In other words, you can easily match them with jeans and t-shirts, just like you can wear a suit and tie. This style is particularly good at adding a sense of maturity to the faces of young people, and it is an excellent choice for anyone who wants to combine a classic style with a bold statement.
The impression of browline frames gives people a sense of vintage and old-fashioned. Nowadays, designers add many fashion elements to the browline frames. For example, a bright black plastic frame is wrapped around the upper edge of the golden frame, and the details are decorated with metal, which adds more elegance and charm to the understated design. The amber browline frame combined with the metal frame perfectly blends modern and retro fashion styles. Or, the metal frame is combined with natural wood. The natural texture of the log is faithfully presented in the browline frame, showing a unique and highly textured style of glasses. For browline frames, there are many styles that combine classic and modern. You can try a pair of browline glasses or sunglasses to have a new look.