How to choose the right glasses for myopia?
Nowadays, people are nearsighted, and they usually think of going with a pair of glasses. However, only from the media, we continue to see that there are substandard myopia glasses and frames in the report, so how should we choose when we buy glasses? How can I match a pair of suitable and high-quality glasses? Different glasses shops vary greatly from optics technology to the quality of lens frames, so different shops have different prices. Faced with a variety of glasses, how should we choose? Generally, we can look at these four standards. First, take a look at whether the eyewear company has obtained a production license for eyewear products. Second, see if the optometry equipment and testing instruments of the glasses companies have qualified marks. Third, see if the optometry and production staff are certified to work. Forth, look at whether the glasses have a conformity mark (certificate). The four certificates of eyewear companies are the prerequisite to ensure the quality of glasses.
Single Vision vs Progressive: What Are Their Differences
With single vision lenses, you can also just use the center of the lenses to avoid prismatic effects if your prescriptions are very unequal for both eyes.
As for progressive vs single vision, they also have differences in frame selection. You will stick to frames when choosing progressive lenses that will provide you with a minimum height of 14mm from the point you are looking through the lenses into the distance to the point you are looking down while you read.
Besides the above differences, they are also some other differences between single vision glasses and progressive lenses. You can choose either one based on your needs. To choose glasses, Koalaeye glasses are recommended. They come in stylish and at a cheap price.
How to buy prescription glasses online?
To buy prescription glasses online, you should get a prescription and visit your local optician for an eye test. This test can be used not only to provide a prescription but also as a regular health check. Ask the optometrist for this data if you have had an eye exam and the optometrist provides a prescription. If you have an extra pair of glasses, send them to an online eyewear retailer to make sure the lenses have the correct 'visual center.' Measure the pupil distance. Ask your optometrist for this number, or get it from old glasses. Choose the right frame style to suit your face shape. Understand the frame measurements. Choose a suitable lens and its different lens film layer. Then place an order for glasses.
What color lenses are good for driving?
The optometrist reminded us that it is not advisable to choose pink, purple, light blue, and other colors with obvious decoration effects for driving sunglasses. These colored glasses basically cannot protect the eyes. In addition, they may change the color and cause chromatic aberration. Generally speaking, you should wear brown and gray glasses when driving. The brown lens can filter out a lot of blue light, which can effectively improve visual contrast and clarity. The gray lens can absorb any color spectrum in a balanced manner and will not produce obvious chromatic aberration after wearing.
Nowadays, the colors of lenses for sunglasses on the market are dazzling. Many people only consider whether they look good when choosing colors, and do not pay attention to the impact of lens colors on vision. When choosing sunglasses, we should not only pay attention to their decoration but also pay attention to their protective function for the eyes. We should avoid using blue lenses when driving because it will make us unable to distinguish the color of the traffic signal lights.
Shape memory alloy
It is made up of nickel, titanium, vanadium, and other metals, and has good elasticity. When faced with external force, the temple can bend more than BETA titanium alloy and can be restored to the original state, so it is named shape memory alloy.
Half titanium frame: Usually, it refers to the titanium combination frame, such as metal frame with pure titanium or β titanium conveniently. It can be reversed, and the former is more common.
What is the best lens material?
The world's first resin lens was made of CR-39 material, and CR-39 is still the main optical lens material in Europe and the United States. After the end of World War II, people found that compared with glass, the main lens material at that time, the light transmittance of CR-39 is high, and it can block ultraviolet light. In addition, CR-39 can be dyed, not easy to fog, and has small dispersion (CR-39's Abbe number is 58) and other benefits.
Wooden frames: Wooden frames are one of the hottest new trends that pair perfectly with round face shapes. The natural materials used on these frames give this style an elegant feel.
Wayfarer glasses: As for how to choose glasses for round faces, wayfarer glasses are recommended. These frames will bring a touch of old Hollywood to your look. In addition, their distinctive angles add contrast to your features.
So, from the above information, you can know that round faces glasses come in all sorts of shapes and colors. In addition, you can also try Koalaeye glasses, which are stylish and come in at a cheap price.
