Roger Bacon
One of the first people credited with inventing glasses was an English friar in the 13th century, Roger Bacon. In his Opus Majus (c. 1266), he outlined the scientific principles of the use of corrective lenses. Some writers believed that monks or friars possessed secret knowledge about glasses, which they later disseminated around the world. Most famously, William Molyneux wrote in his Dioptrica Nova (1692). Unfortunately, there is no evidence that Bacon ever applied his theoretical knowledge of perspective (optics).
Which sunglasses are best for driving, polarized sunglasses or non-polarized sunglasses?
Polarized and non-polarized sunglasses are the same in the ability to protect against ultraviolet rays. But when you work as a driver, in addition to the front of the sun, sometimes there are highway road reflective lights, other car body reflective lights, and so on. Glare will make people's eyes uncomfortable and fatigue, and affect the clarity of vision, stimulating the eyes. Polaroid lenses can filter out light from different angles, so when you driving, is best to wear polarized sunglasses.
Benefits of glasses without nose pads
Glasses without nose pads are mostly used for sheet materials because the sheet material is lighter and not allergic. From the viewpoint of aesthetics and comfort, no nose pads are more suitable. Glasses without nose pads have a relatively small contact area with the bridge of the nose, so it is not easy to have obvious indentations on the bridge of the nose, while glasses with nose pads will have obvious indentations after wearing them for a long time.
In addition to supporting the frame, the nose pad has another function to prevent allergies and avoid discomfort caused by allergies to metals or other materials. Whether it is better to have glasses with nose pads or without nose pads, depends on your personal situation. If your nose is sensitive to weight or the bridge of your nose is lower, you should choose glasses with nose pads. If you are particularly looking for beauty and don't want any marks on your face, then choose glasses without nose pads.
In fact, it is hard to say which one is better between nose pads and no nose pads. The key is to look at personal preference and wearing comfort. Generally speaking, a high nose bridge is suitable for choosing frames without nose pads. It is more suitable to choose the frames with nose pads for people with flat nose bridges in order to prevent the glasses from sliding off and affecting the visual effect.
Why do spectacle frames rust?
Before solving this problem, we can first understand the causes of rust spots on the frames and skin allergies due to rust spots. Many alloy products in daily life contain nickel, and direct contact with the skin will cause allergies to sensitive people. The temples and nose pads are the parts that contact the skin with a large area, especially the outer surface of the metal frame and the interior of metal containing a large amount of nickel. Through contact with the skin and erosion of sweat, the appearance of rust spots and skin allergies are caused. Once allergy occurs, it will cause contact dermatitides such as redness, swelling, itching, and yellow water on the surrounding skin.
Accurate optometry is key.
Optometry before wearing glasses is very key. Children's optometry should choose mydriasis optometry. Mydriasis optometry is a method of optometry designed specifically for children. It works by using drugs to completely paralyze the ciliary muscle of the eye so that it loses its regulatory role. So you can check out the child is true myopia or pseudomyopia. During optometry, you should pay attention to let the child as far as possible to relax, so as not to affect the effect of optometry. For the sake of children's health, it is recommended that parents and friends can take their children to a professional optometry place to choose glasses. In addition, do not rely solely on optometry to determine the child's glasses, but to see which degrees are more suitable.
Where to Buy Titanium Glasses?
After learning the advantages and disadvantages of the titanium glasses, you may ask where I can buy them if I have a lot of budgets. In order to buy titanium glasses, Koalaeye Optical is recommended.
The Koalaeye glasses are stylish and come at a very cheap price. What’s more, Koalaeye Optical provides all kinds of glasses, sunglasses and frames. And the glasses can be shipped for you free. So, if you want to buy titanium glasses, try Koalaeye Optical.
How much does it cost to add the blue light filter to glasses?
Based on the difference in the impact of blue light of different bands on the human body, the blue light transmittance of each band of the product is separately required. For example, in the range of 415-445 nanometers, the light transmittance should be less than or equal to 80%, and above 445 nanometers, it should be greater than 80%. In this way, the anti-blue light products can be restricted, which can effectively shield the blue light that poses a health and safety risk to the human body, but also allows the blue light of the waveband that regulates the human body's circadian rhythm to be effectively transmitted.
Anti-blue glasses are not suitable for everyone. It is only suitable for people who use electronic products for a long time, not for people who are visually fatigued, and teenagers should not wear them for a long time. Furthermore, anti-blue glasses should not be regarded as a 'talisman' and use your eyes uncontrollably after wearing them. Therefore, when using electronic equipment, people must abide by the laws of nature, ensure the normal rest of the eyes, and maintain eye health.
