How to buy prescription glasses online
Consumers should choose different styles of frames according to their age and professional characteristics. Because everyone has different face shapes, different interpupillary distances, and different diopters, the size of the frames should vary from person to person.
Lenses are divided into glass lens, resin lens, and PC lens, and you can choose according to your preferences. The glass lens has a stable refractive index, good abrasion resistance, and stable optical performance, but it is relatively heavy and easy to break. Resin lens with high light transmittance is light, safe, and not easy to break, but the surface is easy to wear. PC lens has a high refractive index, but the surface is easy to wear.
Type of eyeglasses cloth
There are many kinds of cloth for glasses. There is mainly sheepskin eyewear cloth, and there is microfiber eyewear cloth. There are suede and double-sided cloth and so on. Professional eyewear cloth must use more than 200 grams of weight/per cubic centimeter of microfiber. This kind of raw material chemical fiber is fine, and tactility is soft, so it will not damage the lens. This kind of wipe cloth can be used on a computer screen. The two sides of the cloth are different, and the smooth side is used to scrub the lenses. Because the dirt on the lens is mostly small. The rough side is designed to give you more friction when you touch it with your finger, so you can use it more easily, and you can clean it more.
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Rimless glasses provide the minimalist option for eyewear who want their glasses to blend in with their face, or want a larger field of vision. These aviator-shaped rimless glasses are very stylish, with the red or blue at the temple tip highlighting the colors. An adjustable nose pad provides a comfortable fit.
Glasses Size - Frame Width
To really know how big a frame is, and how it will look on your face, you have to determine the width of the entire frame. The outer width of the frame is the distance between the visible areas on the left and right sides of the frame, namely, the distance between the frame and the junction of the two temples. The inner width of the frame is the distance between the inner sides of the two temples at 60mm behind the plane of the lens. This is just the contact point between the temple and the human temple. If it is too tight or too loose, it will affect the wearing comfort. The weight of the frame is evenly distributed across the bridge of the nose (or evenly distributed between the two nose pads on the bridge of the nose).
Does it take time to get used to new prescription glasses?
People who wear new advanced glasses usually have an adjustment period. For novices, please gradually adapt to the glasses. In the first 2-3 weeks, increase the wearing time every day to adapt to the lens. For example, wear it for 1-2 hours on the first day, then add 2 hours a day until you feel comfortable. Before driving, please try it at home. Remember, you need to turn your head and move your eyes to find the 'sweet spot' for the activity you care about.
For experienced wearers, even under the same prescription, a new incremental pairing is required, and some adjustments are usually required. Progressive lens design, frame shape, and many other factors will also affect the adjustment time.
What frames can you choose?
According to its style, the spectacle frame can be divided into full frame, half frame, no frame, and eyebrow frame, combination frame, etc. They each have their own characteristics, but have their own loyal fans, and give users more choice. It is recommended that consumers who like broad vision and light frames choose rimless or half-frame glasses. The young and fashionable people choose the ever-changing full-frame frames. There are also people who like ornamented frames, such as print flow pattern small carving, and so on, and these details on the treatment of different styles of glasses frames have the icing on the cake.
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.
