When shining light through a sheet of manufactured material it could produce a hazy appearance when objects are viewed through the material. It could also create veiling glare, this type of effect occurs on an automobile when the sun hits the windshield. To get a proper haze measurement, quality control specialists use a hazemeter, or a spectrophotometer to provide diagnostic data on the origin of the haze. Luminous-transmittance and haze data are useful for specification and quality control purposes.
Resistance of Transparent Plastics to Surface Abrasion
Swimming goggles lens are consistently getting cleaned and wiped. This purpose of this particular test is to test the resistance of material to several different degrees of abrasion. Abrasive damage is then judged by a visual inspection and then given a haze percentage.
Referee Test, Impact Test
During the referee test, quality control specialists will drop a 5/8-inch ball from the height of 50 inches on the surface of swimming goggle lens. In order to pass this particular test, the lens must not fracture. When importing from China you must have a swimming goggle inspection performed on the lenses as this is a regulation that is enforced by the FDA.