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Surprised! It turns out that glasses cloth cannot be directly wiped......
Release time:
2024-06-23
Crystal lens is the crystal of silica, with hard texture, not easy to wear, not easy to wet, fog is not easy to retain on the surface, the advantages of small thermal expansion coefficient, but the crystal lens on the UV barrier ability is poor, and the natural crystal easy density is not uniform, easy to contain impurities and produce birefringence phenomenon, the price is more expensive.
crystal lens
Crystal lens is the crystal of silica, with hard texture, not easy to wear, not easy to wet, fog is not easy to retain on the surface, the advantages of small thermal expansion coefficient, but the crystal lens on the UV barrier ability is poor, and the natural crystal easy density is not uniform, easy to contain impurities and produce birefringence phenomenon, the price is more expensive.
Glass lens
Glass lens is a molten mixture of silica, the biggest advantage is wear, but because of heavy, fragile shortcomings have been gradually replaced by other lenses. The refractive index of the glass lens can reach the highest 1.90, and the lens can be the thinnest under the same degree, so some patients with high myopia will still choose the glass lens.
resin lens
Resin lenses are generally lighter than glass lenses and have better impact resistance than glass lenses, but their surface hardness is low, so they are easily scratched. In children's glasses, resin lenses have become one of the preferred materials for many families due to their light weight and superior impact resistance.
Special attention: anti-blue lens
Blue light refers to visible light with a wavelength of 400-500 nanometers, of which those with a wavelength of 400-445 nanometers are called short-wave blue light. Note that short-wave blue light will increase the amount of macular toxin in the eye and threaten the health of the fundus, so it is also called harmful blue light.
Blue light is common in our daily life. 25%-30% of sunlight is blue light, and blue light is also contained in the light emitted by electronic devices such as mobile phones, tablets, computer screens, and LED lights. Anti-blue glasses reflect the harmful blue light through the lens surface coating, or the anti-blue light factor is added to the lens substrate to absorb the harmful blue light, so as to achieve the blocking effect of the harmful blue light and effectively reduce the damage of blue light to the eyes.
For people who are facing the electronic screen for a long time, wearing qualified anti-blue glasses will help reduce the damage of blue light to the eyes.
Daily care: do not use glasses cloth to wipe directly
Glasses spent, do not use tissue paper or glasses cloth directly wipe! Because if there are floating dust and sand particles on the lens, wiping directly is equivalent to rubbing the lens with these floating dust and sand particles.
It is recommended to rinse the lens with flowing water first, then apply it directly on the lens with hand sanitizer or detergent, gently wipe it evenly with your hands, then rinse it with water, dry it naturally or suck the water droplets with a soft tissue paper angle.
Guide to glasses: glasses also have a life
Concerned about glasses life
Glasses also have a service life. It is recommended that you have regular optometry to confirm whether it needs to be replaced according to the change of optometry and the degree of wear of glasses.
Choose according to lens brand
Lenses are the soul of a pair of glasses. When matching glasses, shops can be required to show the lenses and their packaging to see if there are any labels with factory name and address information. It is recommended to choose lenses from well-known manufacturers or brand lenses, and purchase lenses without factory name and address carefully.
Select according to lens parameters
According to the lens packaging on the logo and the introduction of the optician, to choose a reasonable lens. The lens mark focuses on the description of parameters such as Abbe number (dispersion coefficient), refractive index, and whether it is an aspheric lens. For people with high myopia, a balanced choice of high refractive index, high Abbe number of aspheric resin lenses.
About Functional Lenses
For special functional requirements, functional lenses can be selected. Such as the long-term face of the electronic screen work, study of the crowd, can choose anti-blue lens; for long-term in the ultraviolet strong outdoor work of the crowd, can choose UV protective lens.
Transfer from: Nanjing Market Supervision
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