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.
Which is better, Essilor lens or Zeiss lens?
1. Different high-density resin substrates. Essilor Diamond Crystal series 1.74 lenses use resin with a density of 1.46 as raw materials. The lens itself has higher hardness. Combined with Diamond Crystal series film layers, the lifespan of the lens is better improved. The outstanding abrasion resistance is obvious.
2. Different technical support. The greater the density of the lens, the harder the substrate. However, the larger the density of the lens under the same volume is heavier. Therefore, Zeiss has the best trade-off between density and component and selects high density on the basis of high refractive index and frivolity substrates.
3. Different Features. The anti-fog molecules on the two surfaces of the lens are activated by an anti-fog activator. Therefore, the fog differentiates into a thin layer that is invisible to the eyes, instead of forming a fog. Each spray of activator can last about a week. Zeiss resin lens guarantees up to 99.4% of the lens light transmittance, and the naked eye can no longer feel whether the lens is worn or not.
Clear glasses can be stylish for children.
Children who wear clear glasses can choose the glasses with good gloss, high hardness, and are not easy to scratch, not easy to wear, durable. Colorful, beautiful, and fashionable glasses show the lovely image of childlike innocence. They had better have the characteristic such as corrosion-resistant, not an easy allergy quality. They are tough enough, colorful, fashionable, and energetic.
Repair your old eyeglasses.
Whether it's a scratch in the lens, a dent in the frame, or a missing screw, it's possible to get your glasses fixed and save you a lot of money. In America, a small screwdriver in an optical store, an electronics store, or even a Christmas cracker is enough to help. Or you can run some thin wire through the hole where the screw is, then use some pliers to wind the wire around the inside of the frame a few times, and then use the pliers to screw the ends together. You can use commercially available scratch repair kits to fix scratches on your lenses, or you can use household products like toothpaste or baking soda to polish and remove scratches. If you don't have time to do it yourself, you can call a professional to fix it.
What is the best lens material?
Early lenses were made of natural materials because they were easy to get. But natural materials have obvious drawbacks. According to records of the Qing Dynasty, Emperor Yongzheng wore crystal glasses given by the imperial court, which greatly improved the efficiency of reading documents. However, because of the cold nature, the crystal will make the temperature around the eyes low when wearing, and part of the crystal lens has color so that the light into the eyes becomes soft.
Uvex Stealth OTG Safety Goggles
They provide more protection and coverage than other prescription safety glasses. Due to the full seal around the eye, these OTG safety goggles prevent chemical splashes, and bumps, and scratches, making them wonderful general-purpose safety goggles to wear over your prescription glasses. Dura-Streme's scratch-resistant coating helps keep the lenses crystal clear, which is especially important when wearing the underlying glasses.
What does the face with sunglasses emoji mean?
The Face With Sunglasses emoji depicts a smiling face wearing sunglasses. It is usually used to express that someone or something is cool, calm, easygoing, or carefree. It can be used to express appreciation or approval like words OK or awesome. The Face With Sunglasses emoji can literally mean a sunny or warm day. Wednesday, June 27 is National Sunglasses Day. The Face With Sunglasses emoji is often paired with the Sunglasses emoji, which are similar in context and meaning. The sunglasses emoji is a pair of dark glasses with sunglasses on. It is often used to mean that someone is cool or special but can refer simply to the act of wearing sunglasses.
