The Optical Center of A Lens
When wearing glasses, try to look through the optical center of the lens. This needs the cooperation of the neck, you can slightly lower the head when looking at the computer, to adjust the line of sight. The Center of optical glasses is divided into two kinds: 1 mm up myopic lens center is the most proper, of course, more than 2-3. And the most important thing is that the lens pupil high (about the two-lens optical center of the high and low) must be proper (that is, the right of the lens optical center is 1 mm, the left must be 1 mm. 2-3 mm is the same, what is the height of the pupil on the right side must be the same on the left side. The optical center of the presbyopic lens is 1 mm, the most proper.
What are the advantages and disadvantages of bifocal reading glasses?
The advantage of bifocal reading glasses is a large field of vision, and they can be used with the same pair of glasses to see far, near. The cost is lower. But different areas have obvious intervals, and the appearance is not beautiful. The middle distance is fuzzy. They need to adapt to the period. Bifocal reading glasses lens is divided into two parts, and the degree of the two parts is not the same. The upper part is the mother of the flat area to see far, and the next part is the child of the reading area to see near. There is an obvious interval. The appearance is not beautiful. There is no transition area between two different areas, so its vision is fuzzy, easy to produce a 'jump image'. Long-term wearing will make people dizzy or fall down when climbing stairs.
Why should you clean the eyeglass case?
Although the eyeglasses case is used less, it can not be separated from the glasses. If it is not cleaned for a long time, it will affect appearance and carry a lot of bacteria.
Transitions® Photochromic Lenses
When you step outside, it immediately begins to darken. The lenses help prevent harmful blue light from digital devices, screens, and sunlight to help reduce glare and prevent eye strain. They have the function of 100% UV blocking,anti-reflection treatment with blue light protection. They can constantly adapt to changing daylight conditions to reduce excess light and optimize color contrast and polarized light to prevent dazzle. They filter out excess light to provide maximum comfort. And provide high contrast and minimize glare. They provide increased color recognition and depth perception.
What progressive spectacle lenses are best?
Essilor is a brand, and it designs, manufactures, and markets a wide range of lens products to help people correct and protect their vision. Essilor adheres to the corporate mission of 'improving vision, improving life', invests 200 million euros in research and development every year, and constantly launches new products to enhance consumers' experience in wearing glasses. Continuous innovation has always been the core gene of Essilor. In 1959, Essilor created the resin lens, and in the same year, it invented the world's first progressive lens. Innovation involves technology, manufacturing, sales, and service. Based on innovation, they can make as many people as possible obtain visual health, and this is the driving force to promote their development.
The Pros of Titanium Glasses
First, titanium is used in its pure form and as an alloy to provide a highly flexible eyeglasses frame. In fact, titanium eyeglasses are flexible. So, they are able to bend without breaking and can return to their original shape.
Second, titanium glasses come with good durability. Titanium alloy metals produce the world’s most durable eyeglasses frames. Choose a titanium frame and it will be nearly impossible to break.
Third, the titanium glasses are extremely lightweight. They are about 40% lighter than the standard steel glasses frames. In addition, due to the superior strength of the titanium frame, the frames can be made thinner making for even lighter frames.
Fourth, titanium glasses have hypoallergenic properties. It is rare anyone experiences adverse skin reactions to titanium frames. There are many other options on titanium frames such as color, texture, and patterns. What’s more, titanium glasses are corrosion-resistant.
So, are titanium glasses worth it? You may have the answers.
What are the functions of anti-blue glasses?
The myopia of young people is getting worse every year, and the main factor that causes myopia in young people is the high-energy blue light of mobile phones and computers. Children’s lenses are clearer and more transparent than adults and have a weaker effect of blocking and filtering the blue light of electronic products. The blue light transmittance of their lenses is several times higher than that of adults so there is more blue light penetrates the lens to reach the retina. Therefore, the damage caused by blue light to children's eyes is much more serious than that of adults. Naturally, be careful with blue light. When the child is facing the screen of the mobile phone and computer, wearing anti-blue glasses can more or less reduce the blue light and reduce the blue light energy. The blue light energy that enters the retina is not so much so strong, and naturally, it will not damage the pigment epithelial cells and photoreceptor cells on the retina, thus protecting the child's eyes.
The main function of anti-blue glasses is to relieve eye fatigue, reduce retinal damage, prevent myopia from deepening, and reduce the incidence of special eye diseases such as macular degeneration and cataracts. According to your own situation, if you are really looking at the phone and computer screen for a long time, wearing anti-blue glasses is better. Usually, pay more attention to the habit of using your eyes, rest your eyes appropriately, and play less with mobile phones and computers.