How Far Should Your Eyes Be From Computer Screen?
Tue, Mar 15, 22 By : Koalaeye
Bolon Driving Glasses It is a big brand of sunglasses in China. Bolon sunglasses use pure handcrafted materials and elaborately designed LOGO to interpret the excellent texture and perfect taste of Bolon sunglasses show the distinctive, extraordinary, elegant, and noble temperament. 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,...

Bolon Driving Glasses

It is a big brand of sunglasses in China. Bolon sunglasses use pure handcrafted materials and elaborately designed LOGO to interpret the excellent texture and perfect taste of Bolon sunglasses show the distinctive, extraordinary, elegant, and noble temperament.


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.



Who should wear low bridge glasses?

According to the website of the American Optical Association, low-bridge glasses are for people with a low bridge of the nose (when your nose is at or below the pupil level), a wide face, or high cheekbones. This pair of glasses fit anyone with a low nose. If you have a tall bridge, it's great to have a bridge near the eyebrow line. If you have a low bridge of the nose, a more curved brow or a lower bridge of the nose frame is a better choice. Because the dimensions of the bridge are measured from the inside of the frame, a thick-sided frame with the same bridge dimensions and a very thin frame will not fit. It may actually be too small. Because it allows for extra edges.


How to clean the lenses?

When wiping lenses (especially the rimless glasses of resin lens), you must use a special wipe lens or soft handkerchief or paper. When you wipe the lens, you can only wipe it in one direction, not in circles, and don't touch the lens with your fingers. When the lens is stained with dust and sand, it should be washed with water before wiping, otherwise, the lens is likely to be abraded, and the operation should be gentle. At ordinary times, when cleaning, do not exert too much force, pay attention to the grasp of strength. When wiping the lens, it is best to take the side frame with one hand, and the other hand takes the glasses cloth to wipe gently. In order to prevent the lens film layer falls off, do not use alkaline detergent to wipe the lens. Therefore, when bathing or playing at the seaside, glasses should be properly kept to avoid water vapor or seawater caused by corrosion of glasses.



The frame of prescription glasses

At present, the more common materials for frames are non-metal and metal. Non-metals mainly include TR90, sheet material, etc., and metals include alloys, titanium, and so on. TR90 and sheet material are actually plastics, but they are firm and are not easy be deformed at room temperature. Also, they have good formability so that they can be made in many fashionable styles. The general alloy material has good firmness and flexibility, but the disadvantage is that it is easy to fade. The pure titanium frame is corrosion-resistant and very strong. It is about 40% lighter than the general alloy frame. It must be welded and electroplated in an oxygen-free state, which requires high equipment and technology. Relatively speaking, the price of TR90 and alloys will be lower, and pure titanium will be more expensive. You can choose according to your budget.


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.



Progressive lenses and single vision lenses

Single vision lenses are the most widely used optical lenses and are suitable for the general population.

Progressive lenses are suitable for below people.

① Myopia control lenses for teenagers. Progressive lenses are used to relieve visual fatigue and control the development speed of myopia.

② Anti-fatigue lenses for adults. Progressive lenses are used for teachers, doctors, people who use too much computer at close range to reduce visual fatigue caused by work.

③ Progressive lenses for Middle-aged and elderly people. A pair of glasses for middle-aged and elderly people to easily see near and far.

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