What are progressive lenses and cleaning appliances


Are multifocal lenses suitable for children to wear? To answer this question, we must first clarify the following questions:

   One, what is a progressive lens:

  Progressive lens, also known as progressive multifocal lens, refers to a lens with continuous and uninterrupted gradual change in brightness from far use to near use.

  Second, the advantages of progressive multifocal lenses:

  1. The appearance of the lens is the same as that of a single vision lens, so you can’t see it The dividing line of the degree change. The beauty of the lens protects the wearer's desire to protect age privacy, and eliminates the wearer's worries about exposing age secrets due to wearing bifocals in the past.

  2, the change of the lens power is gradual, and there is no image jump. It is comfortable to wear and easy to adapt.

  3. Lens power The optical lens is gradual, and the change from farsightedness to nearsightedness increases step by step. It will not produce fluctuations in eye adjustment and is not easy to cause visual fatigue.

  4. Clear vision can be obtained at various distances within the visual range. A pair of glasses meets the use of long-distance, near-use and intermediate distance at the same time.

   From the above, it is not difficult to see that multifocal lenses are suitable for children.

  The specific reasons are as follows:

   A progressive lens is a type of lens used to see far above and below to see near , Lenses with different upper and lower degrees. This kind of lens has a good adjustment effect on students' myopia. Because for students, the progressive multifocal lens used for myopia control can read and write through the low-degree convex lens below the lens, reduce the distance adjustment, and alleviate or prevent the occurrence and development of myopia from the optical lens. The middle and upper progressive myopia lenses can still provide clear and continuous middle and long-range vision.

   Lens cleaning tools

   There are two types of cleaning tools for general lenses, one is detergent and the other is This is a cleaning cloth.

  1. Cleaner:

   Now there are specialized lens care agents or cleaners on the market, whose role is to clean the lenses. It is generally produced by lens manufacturers, so it is guaranteed in terms of composition that it will not contain chemical components that damage the lens film.

   If there is no detergent, two common cleaning products, detergent and soap, can also be used when cleaning the lens. Gently apply it on the surface of the lens and rinse with water. That is, the chemical composition of these two focusing lens cleaning products will not damage the lens.

  2. Cleaning cloth:

   There are two common lens cleaning cloths, one is the lens cleaning cloth that comes with the purchase, and the other is the paper towel we commonly use. Both of them can be used to wipe and clean the lenses, but pay attention to keeping the cloth or paper towels clean. Otherwise, bacteria will be contaminated on the lens, which may cause cross-infection of the eye. In addition, paper towels that are too hard will scratch the lens, so choose soft tissues. There is also a cleaning cloth, which is lens cleaning paper. Lens cleaning paper can be used to clean a variety of optical lenses such as camera lenses and microscope lenses. It is more professional. You can usually buy it at a photographic equipment store.

   When choosing lenses, you must first understand your own needs and preferences. According to the aspheric lens profession, the activities you often engage in or travel requirements, etc., if you often engage in outdoor activities or travel, Color-changing lenses are a good choice.

   When the nature of work or living habits is prone to dust and scratches on the lens, it is best to choose glass lenses instead of super-hard lenses. Often speaking in public or in front of the lens It is best to choose anti-reflective coated lenses to increase the trust of others, and it is best to choose anti-radiation lenses for workers who often watch computer screens.

   If the lenses that have been used before are easily scratched, in addition to the habit of cleaning the glasses, the durability and scratch resistance of the glass lenses are very prominent. In addition, if If you are not satisfied with the thickness or appearance of the lens, you may choose ultra-thin or aspherical lenses.

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