what do eyeglass frames cost?

Benefits of Progressive Lenses

The lens looks like a single vision lens, with no dividing line between degrees. Not only is it beautiful in appearance, but more importantly, it protects the privacy of the wearer's age (for the wearer of reading glasses). There is no need to worry about showing the secret of the wearer's age by wearing the glasses. Because the degree is gradual, the replacement of the adjustment effect is increased step by step according to the shortening of the close distance. There is no adjustment fluctuation, which is not easy to cause visual fatigue. Clear vision can be achieved at all distances in the visual scope.

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.

How to Choose Glasses for Square Face?

What glasses suit my face or what glasses suit my square face? If you have the same questions, you come to the right place. This post will show you some advice.

In fact, there is a wide range of eyeglasses available for square faces. Round and oval glasses are the best choice for people with square faces. These frames will soften and balance your strong jawline and add contrast to your face shape.

Now, we will show you some suggestions for the glasses for square faces.

Round glasses: round glasses are a sophisticated, polished look that works well with a square face shape. No matter what color you choose, this style works beautifully with a square face shape.

Browline glasses: as for glasses for square face, you can choose the browline glasses. These glasses are thicker at the top, mimicking the way the eyebrows frame the face. Their unique design is one of the best glasses for square faces.

Leimi Driving Glasses

With professional production and sales of sunglasses/flat glasses/sunglasses, Leimi has been focusing on the fashion aesthetics of sculpted glasses. They are presented through the exquisite selection of materials and fashionable and comfortable design. Leimi carefully makes glasses and discovers the beauty of the world together. Leimi advocates for consumers to experience the number of products through the exquisite materials and fashionable and comfortable design of various glasses products. Leimi believes that it can impress consumers with its products. Since its establishment, Leimi has always been striving to treat customers with high-quality products and good service. At present, Leimi's main products are swimming goggles, reading glasses, sunglasses, lenses, anti-radiation glasses, sunglasses for women, children's glasses, glasses frames, polaroid glasses, driver's glasses.

The material of the nose pads

There are many differences between silica gel and PVC materials. For example, silicone can pass ROHS certification and is environmentally friendly. Silica gel is soft and feels good, while PVC products are rough. Silica gel products are soft, while PVC products are hard. Silica gel products are more flexible, but PVC has no toughness. Silica gel products are usually made to be more transparent. Glass frames made of plate material and TR-90 material, are relatively not heavy and non-allergic. Typically, the TR90 frame is cast to form a nose pad attached to the glasses ring. As the plate frame is cut out from compressed materials, the plate frame with a nose pad is usually injected into the nose pad after the frame is made.

Why are some glasses expensive and others cheap?

Lenses do not regulate vision, but some progressive lenses can help the ciliary muscles to adjust. The quality of the lens is mainly determined by the transmittance, the surface, the aspherical surface, the refractive index, the coating quality.

The higher the refractive index, the thinner the lens, and the more expensive the price, for some people with high degrees, the lenses also play an aesthetic role. Commonly used are green film, and some are purple film, gold film, etc. How much cheaper is a relative number, and there are many other factors to consider besides price.