What tests are required to test whether a pair of glasses is qualified?
Publish Time: Author: SkyLine Editor
The Quality Inspection Center for Eyewear Products will use eyeglasses testing equipment to test all of the prescription eyewear, sunglasses, presbyopes and frames, personal protective eyewear, swimming goggles and other products on the market, covering all national standards and some international standards related to the inspection of eyewear products, such as top focus, refractive index, abrasion resistance, light transmission, harmful elements, adhesion, and folding resistance of frames.
What tests are required to test whether a pair of glasses is qualified? The Quality Inspection Center for Eyewear Products will use eyeglasses testing equipment to test all of the prescription eyewear, sunglasses, presbyopes and frames, personal protective eyewear, swimming goggles and other products on the market, covering all national standards and some international standards related to the inspection of eyewear products, such as top focus, refractive index, abrasion resistance, light transmission, harmful elements, adhesion, and folding resistance of frames.
A pair of glasses includes two main parts: lenses and frames. During the visit to the frame testing laboratory, it was found that engineers need to use the glasses frame tester, endurance tester, torsion testing machine and other equipment to conduct experiments on frames such as fatigue resistance, nose deformation, and sweat corrosion resistance. For sweat detection experiments, a corrosion tester is needed to simulate human sweat and detect the corrosion of sweat on glasses, whether there will be corrosion spots, discoloration, rusting, peeling or falling off of the coating, etc.
Engineers said, metal eyeglasses frame in the process of wearing often contact with sweat, so need to have good corrosion resistance, some metal frame in order to get better mechanical properties, often add a small amount of nickel, so that the metal has good strength, toughness. However, in the process of consumer wear, if the outer surface coating of nickel-containing products fall off and direct contact with the human body for a long time, harmful substances nickel will precipitate, thus causing skin allergies and endangering human health. Therefore, before the glasses leave the factory, we also use the coating adhesion tester to test the adhesion of the coating.
Engineers recommend that you must wear qualified glasses, if you wear unqualified glasses, it will cause visual fatigue, headaches, dizziness, nausea and other conditions, vision loss, and in serious cases, it will cause amblyopia, strabismus and other functional damage. Qualified eyeglass frames are also important, the old loose frames will not only be easy to break Spectacle serious and even hurt the eyes.
