The glasses are too loose or too tight at the temple.
If your glasses are too tight on your temples, you will feel uncomfortable. On the other hand, if your frames are too loose, it can make you look not energetic. Either way, you can adjust the frames at home to make them more comfortable. If the arm squeezers your temples. If the frames are metal, hold your lenses in place with your less-used hand. Use your dominant hand to gently press outwards on the corner of the frame, between the hinge of the frame and the lens. Repeat this step on the other side of your body to make your temples looser. If the frame is too loose from the temple. Again, for metal frames only, use the same method as you used to relax the frames, but apply slightly inward pressure on the corner between the hinge and the lens. Repeat on the other side, tightening the fit around the temple. Adjusting the temples of rimless, half-rimless, or plastic frames can break them. You are advised to take these frames to the optical shop for adjustment.
Understand the impact of frame selection on the lens
Frame size is an important consideration when using progressive lenses because some progressive lenses work better in frames of different sizes. Since progressive lenses allow you to see at all distances, it's important that the whole range of vision fits within the frame. Therefore, very short lenses and larger lenses are not suitable for progressive lenses.
What is blue light?
Our daily lives are inseparable from mobile phones, computers, tablet computers, and other electronic products. Many people's eyesight is also going downhill due to long-term exposure to strong light electronic screens, and their eyes are more or less potentially adversely affected. It is found that many optical stores sell blue light filter glasses, which have the function of blocking 99.9% UV and scattered blue light, alleviating visual fatigue. They claim that these glasses can block short-wave blue light emitted by electronic products such as mobile phones and computers, and even prevent age-related macular degeneration so they are much sought after by consumers. The price of these so-called anti-blue-light glasses varies greatly, ranging from dozens of dollars to several thousand dollars. Do these blue light blocking glasses really have so many magical functions?
The natural light seen by the human eye is composed of a spectrum of different colors, including red light, orange light, yellow light, green light, blue light, indigo light, purple light, which gives people a visual feeling of white. Different wavelengths present different colors visually, and the shorter the wavelength, the higher the energy. At present, products with electronic screens such as computers and mobile phones use LEDs and other materials to emit light mainly in three colors of red, green, and blue, and blue light accounts for the main part. Blue light belongs to the range of visible light, belongs to short waves. And the wavelength is between 400 nanometers and 500 nanometers, which is close to ultraviolet and carries a large amount of energy. And this part from 400 nanometers to 450 nanometers is called high-energy short-wave blue light.
Select the lens.
The choice of lenses is one of the matters to note with glasses. Teenagers are active and often do sports. They can choose resin lenses, which are light, durable, and not broken. For some adolescents with complex refractive conditions, it is best to customize the lens in the case of the need for custom lenses, to get the perfect pair of glasses. Choose the refractive index that is right for you. The thickness of the edges of the lens is related to the size and shape of the frames in addition to the refractive index. The original state of the myopic lens is a circle that is thin in the middle and thick around, and then it is ground into the shape that suits the lens frame. If the thinnest center is relatively far from the edge of your frame, that is, if that frame is large, the edge of the lens will be thicker.
How about buying glasses online?
The benefits of online glasses matching for merchants are that there is no need to rent a physical store, no need to decorate the store, and no need to keep a lot of inventory, so a lot of expenses can be controlled. And now there are many online shop glasses businesses, and the price is more transparent. For the price, online glasses are very advantageous. In order to match comfortable glasses, you need to have a certain understanding of their own appropriate glasses.
The life of the color-changing lens
There is a reaction fatigue problem in both compound reaction and bond-breaking ring-opening reactions. Therefore, there is a shackle in the process of discoloration, which is the life of the discoloration lens. Generally speaking, high-quality color-changing lenses can maintain more than 90% color-changing effect after 2 years of use.
The inadequacies of bifocals
The field of vision is smaller than that of the single vision lens, especially for the close view. For example, reading and reading newspapers need to make it coordinated with the head movement, there are optical defects of image jump and image displacement. There is a boundary, and it is easy to be seen that wearing a bifocal lens exposes age. Bifocals clearly demarcate the near and far regions, affecting appearance and vision. And when far view and close view change, the objects will jump. Because most myopic patients have a lag in the adjustment response, wearing bifocal lenses not only does not delay the development of myopia but has side effects. Therefore, bifocals are not suitable for teenagers to control myopia, and only a few special patients need to wear bifocals.