Sunglasses are used for sun shading,people in the sun usually have to adjust the size of the pupil to adjust the light flux, when the light intensity exceeds the ability to adjust the human eye, it will cause harm to the human eye.So in the outdoor activity places, especially in the summer, the need to use sun shade glasses to block the sun, in order to reduce the fatigue caused by eye regulation or strong light stimulation caused by the injury. Teencher Inspection team consists of professional quality control and international trade experts, each memberwith extensive inspection experience and very strong sense of service. our inspection can help you to reduce logistics costs, return risk, complaints, compensation and potential brand reputation due to quality problems.