Frame Selection of Progressive Sunglasses
Choose a proper frame range. Only if the frame is not very large and beveled, the frame can be very flat. Because the distance from the glazed to the optical center of a progressive multi-focus lens is 19-17 mm, and the distance between the edges of the frame will be no less than 28 mm if the area inside the lens can be used at close range while maintaining the far sighting field.
The first inventor of wearable glasses is not known. However, it was the Romans who first discovered the use of glass to enhance their ability to see small words, creating small magnifying glasses with spheres. The first known wearable glasses in history appeared in Italy in the 13th century. They were used mainly by monks, and became popular little by little during the Renaissance, as the technology improved. As their popularity grew, the Italian glasses spread throughout Europe, mostly within reach of the wealthy. Because learning was a prized attribute during the Renaissance, glasses were a status symbol of wisdom and prosperity. With the temple extending above the ear, the glasses are no longer required by hand.
Pure titanium spectacle frame
Pure titanium is α-phase titanium containing a certain amount of oxygen, nitrogen, carbon, silicon, iron, and other element impurities. Titanium is an indispensable material for modern aerospace science, marine science, and nuclear power generation, and other cutting-edge science industries. Titanium is 48% lighter than ordinary metals, has strong toughness, acid and alkali resistance, corrosion resistance, high stability, high strength, good elasticity, and other advantages. It is in line with ergonomics. Titanium is non-toxic to the human body and does not have any radiation.
Why do glasses with the same prescription feel different?
The old glasses 'remodeled' your eyes. Sometimes, all data on optometry and processing are accurate, and the spectacles equipped are in full compliance with the prescription for optometry, or the power of new spectacles is exactly the same as that of the old spectacles, but you will still be dizzy when wearing the new spectacles. This is because the old glasses 'remodeled' their eyes during long-term wear. For example, the old glasses used by some people have been severely deformed. The temples are no longer in the same plane, and the optical center area of the lens will deviate from the interpupillary distance measured by the glasses at that time. However, the wearer does not mention this situation, and the eyes gradually adapt to this kind of deviation. After putting on a new pair of glasses, you will not adapt to them.
Change the lens.
If you like your frames, but your prescription changes or the lenses are damaged, you can simply replace the lenses in the existing frames. Most optical shops will let you choose this method to reduce waste and save money. It is recommended that you take the frame to your local store and talk to the team. They will be able to assess the suitability of your eyeglasses and will be able to give you a quote based on your requirements.
Benefits of Progressive Lenses
Progressive lenses are different from traditional reading glasses and bifocal glasses in that bifocal reading glasses have to constantly change the focal length, causing fatigue. And there is no clear dividing line between the two focal lengths. They are more comfortable, more beautiful. When you see far or see near, a pair of glasses can be done, so they become the best choice for old people little by little.
Progressive lenses allow multiple fields of view to be merged into a single lens with no discernible difference between the fields themselves. Degrees of the lens vary gradually from far to medium to your full reading. This is why progressive lenses are often regarded as no-line bifocals or trifocal points.
AMMA RAY 003 anti-ultraviolet, strong, harmful blue light computer glasses
They can reduce digital eye strain caused by the harmful blue light emitted by digital screens. They help relieve visual fatigue and discomfort caused by long hours surfing the Internet, playing games, and working under fluorescent lights. These photosensitive glasses come with UV400 for protection and glare reduction. Ultra-light, with flexible TR90 nylon materials, the glasses are durable. The casual frame is designed to make you look professional and stylish while working or playing video games. The magnification/power of your computer reading glasses depends on how far away you are from the screen.