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.
What Glasses Lens Thickness Should I Choose?
In this section, we will show you how to choose glasses lens thickness. Lens thickness will depend on the strength of your prescription, your pupillary distance, the size of the frame and the lens material. Usually, high prescription glasses are thick.
If you have moderate nearsightedness, you should choose thinner lenses at the edge thickness of your lenses will be more visible. If your sphere prescription is between -2.50 and -4.00, the lenses with a refractive index of 1.6 would be an ideal choice. A lens with a refractive index of 1.67 is suitable for sphere prescription between -4.00 and -6.00, and any prescription over that a lens with a refractive index of 1.74 will be more suitable.
So, when you purchase prescription glasses, consider the glasses’ lens thickness also. If you want to get a pair of prescription glasses online, Koalaeye Optical is recommended. It is an online optical store and provides all kinds of eyeglasses, sunglasses and frames. Besides, these glasses are stylish and cheap. If you purchased, the glasses will be mailed to you with great convenience.
Be careful to choose driving sunglasses.
Many people take it for granted that the darker the color, the better its UV protection. The function of filter the ultraviolet ray of the sunglasses is concerned with the film of plating only. Especially for long-distance drivers, wearing sunglasses that are too dark can make eyes more tired. And entering dark areas such as tunnels from the strong sun is more dangerous.
Some drivers are slightly myopic, but when they wear sunglasses, there's a problem: their eyes are more likely to tire and the vision can deteriorate, just like driving at night. So, if the slightly myopic drivers want to wear sunglasses, they must be equipped with a myopic degree of the lens.
KOALAEYE blue light glasses
We take classes online, telecommute and shop online... Cloud life has become the norm for people to work and relax. While it adds convenience, it helps increase the time spent staring at electronic screens, which increases the risk of eye health damage. The latest data shows that mobile Internet users spend 144.8 hours a month on average. Blue-light-blocking glasses are becoming more and more popular. Advertisements for these glasses claim that excessive exposure to blue light can cause a series of eye problems, like eye dryness, eye fatigue, and, in severe cases, loss of vision. In order to protect your eyesight, there is a kind of blue light shielding glasses on the market, claiming to protect against computer radiation and blue light. So what can you choose to prevent blue light glasses?
The material of KOALAEYE blue light glasses has the benefits of ultra-lightweight design, wear resistance, and low friction coefficient. KOALAEYE blue light blockers (with yellow tints) are effective at blocking 100% of the harmful UV rays and relieving eye strain, especially when watching TV and computer. They always pay attention to the quality of their products.
What frames can you choose?
According to its style, the spectacle frame can be divided into full frame, half frame, no frame, and eyebrow frame, combination frame, etc. They each have their own characteristics, but have their own loyal fans, and give users more choice. It is recommended that consumers who like broad vision and light frames choose rimless or half-frame glasses. The young and fashionable people choose the ever-changing full-frame frames. There are also people who like ornamented frames, such as print flow pattern small carving, and so on, and these details on the treatment of different styles of glasses frames have the icing on the cake.
Geometric Cat-Eye glasses
Geometric cat-eye glasses are a big trend this year. They accentuate the personality and the shape of your face. If you have a square face, a geometric cat-eye frame will add some angle to your face, which can be very flattering. Cat-eye frames are both sexy and serious, drawing the image of a determined woman who knows what she wants. Choose the modern contours of Treble. Retro cat-eye black frames are a great option for women working in a business setting, as they give you a smart and mysterious look that is sure to emphasize your professionalism.
Target Optical
Target Optical provides easy eye care. They both deliver on the promise of expect more, pay less, combining high-quality eye care, fashion, affordability, and a simple, fun shopping experience. You can always get more for less. There are popular contact lens brands like Acuvue、CIBA and Specialty Glasses.No matter what you choose, there is an unconditional warranty.
