What kind of lens is a progressive lens?
Progressive lenses are optical lenses designed for simultaneous correction of far, medium (for computer use), and near (for reading). They are Progressive Additional Lenses (PAL). The so-called progressive, The so-called progressive, is the use of polishing technology to achieve a gradual transition between the two focal lengths. The advantage of this design is that the wearer can see far and near objects alternately without taking off the glasses.
Polycarbonate vs Plastic Lenses: Which One Is Better?
From the above information, you may have learned some features of polycarbonate glasses and plastic lenses. So, do you know which one is better?
Here are some a few differences between both lenses to determine which one is better.
- Polycarbonate lenses are more expensive than plastic glasses.
- Polycarbonate lenses are very resistant to tint compared with plastic lenses which accept tints.
- Polycarbonate glasses have inherent UV protection, while plastic lenses do not have.
- Polycarbonate glasses have higher impact resistance and offer greater protection than plastic lenses.
- Polycarbonate glasses are lighter than plastic glasses.
- Plastic glasses have a higher optical clarity than polycarbonate lenses.
So, from the above part, you may have learned which one is better and you may have a decision of how to choose.
The frame needs to match the face shape.
Based on the basic principle of modifying the face shape, avoid wearing frames that are too similar to your face shape as far as possible, so as not to cause the lines of the face to be overly emphasized. The combination of the glasses and the face shape determines whether the glasses are suitable for you or not. Usually, we use the shape of the glasses to modify the shortcomings of the face shape. For example, for a man with a square face, round glasses are more suitable.
Eyeglasses Holder Strap Cord
It uses a reinforced anti-slip clamp ring. With an oversized metal clip and top-quality PU leather around the neck, this eyewear holder strap will provide stylish features. Unlike other eyewear cords, it will not make you look old. They are suitable for all types of glasses, from small frames to large frames. These eyewear chains and wires are suitable for both men and women, providing universal compatibility. They are suitable for reading glasses and magnifying glasses. You will have a stylish bag and cleaning cloth.
How to buy anti-blue light products?
In order to further standardize anti-blue light products and make all kinds of products effectively protect eye health, relevant standards have been formulated. Based on the different effects of blue light in different bands on the human body, the transmittance of blue light in each band is required in the standards.
For example, in the band range of 415-445 nm, the transmission ratio of light is less than or equal to 80%, and more than 445 nm, it is greater than 80%.
Bifocal lenses have two observation areas separated by visible lines, a larger observation distance area, and a smaller reading area. It may take some time for people who are wearing bifocal glasses for the first time to get used to the lenses. This is mainly due to learning how to move the eyes between the observation distance area and the reading area. Some people will also find that there will be an 'image jump' phenomenon at the visible line between the distance and the reading area, especially for those with limited mobility, who must look down when walking. The best way to get used to bifocals is to wear them as much as possible.
What's the significance of the glasses donation campaign?
The eye loves public welfare activities can increase the public awareness of eye love. China has one of the highest incidence rates of myopia in the world. With the popularity of computers and mobile phones, myopia is becoming more and more common among teenagers. Visual health is a significant component of universal health. Public awareness of eye health needs to be improved. It is the responsibility of an enterprise to support economic and social development and care for the poor and vulnerable groups. Nowadays, the myopia of teenagers is becoming more and more worrying. Good eyesight is not only very important in the learning stage, but also accompanies a person's life, so it is the responsibility and obligation of enterprises to help prevent and control the myopia of teenagers. The glasses donation activity shows the glasses industry's active action and professional spirit of fulfilling social responsibility and advocating social welfare. They can take practical actions to fulfill corporate social responsibility and help teenagers grow up. At the same time, people from all walks of life should take active actions to pay attention to the eyesight health of young people.