How long is the life of a resin lens? _Lens knowledge

If the eyes are the 'windows to the soul' of human beings, then the spectacle lens is the most important part of the spectacles. The quality of a pair of spectacles mainly depends on the material of the spectacle lenses. At present, in the eyewear industry, the most used materials for eyeglass lenses are resin and glass. Today, let's take a look at how long the service life of resin lenses is. The resin in the resin lens is a hydrocarbon compound from a variety of plants, so it belongs to an organic material with a polymer chain structure inside, the intermolecular structure is relatively relaxed, and the space between the molecules can also produce relative displacement. . Therefore, compared with glass lenses, resin lenses have much better light transmittance and strong impact resistance. No matter what material spectacle lenses are made, regular maintenance and inspection are required, because glasses are special commodities with medical attributes, and only regular updates can keep them in good working condition. Take resin lenses as an example. Compared with lenses made of other materials, the lenses are relatively light in weight, not easy to be broken, and have strong toughness. However, the hardness of the resin lens is relatively low, and scratches and cracks are prone to occur during use. However, once a crack occurs, its optical performance will be affected, and the light transmittance will also be reduced. When many people wear glasses, they tend to wear them all the time, unless they are broken or the degree cannot be satisfied. In fact, if the resin lens is worn for a long time, the optical performance will be reduced, resulting in frequent eye fatigue and easy to cause vision loss. Therefore, when using resin lenses, it is best not to 'extend serviceBecause, in addition to regular optometry when wearing glasses, the most important thing is to take care of the lenses. If you find that 'overdue service' is found, it must be replaced immediately to avoid damage to the eyes. From the above materials, it can be seen that the service life of resin lenses is generally 2 to 3 years. Of course, sometimes it will be replaced in 1 to 2 years, depending on the usage. But remember, to maintain and check the optical performance of the lenses regularly to avoid damage to the eyes during wearing.