The same style and specifications, but the quotes from different suppliers may differ by double or even more. Many buyers' first reaction is to "look for the expensive one", but what really needs to be asked is: what did the cheaper one save? This article breaks down the cost structure of lenses from three aspects: raw materials, processes, and testing

1： Can raw materials be saved? There is a significant price difference between PC (polycarbonate) materials and recycled and PS materials, which is the most common "cost optimization" space for low-priced lenses. After multiple processing, the molecular chains of recycled materials break and their toughness decreases significantly; The impact resistance of PS material itself is far inferior to that of PC, and it is prone to brittle fracture into sharp fragments upon impact. The common characteristics of these two types of raw materials are: white hair gray on the edges, impurities, and easy white marks or even direct breakage when bent. The money saved on raw materials will eventually be returned in the form of return rates and safety risks.

2： Can the craftsmanship be saved? The precision of the mold determines the optical surface shape of the lens. The cost of mold making is high, and some suppliers may use second rate molds or even refurbish the molds, at the cost of uneven lens curvature and significant optical distortion - users may experience distortion and dizziness after wearing them for a long time. The hardening and coating processes are also major cost items: eliminating the need for hardening treatment, the lens will scratch in a few days; Replace permanent anti fog coating with spray anti fog agent, which will become ineffective after a few rubs. These differences are difficult to distinguish with the naked eye at the time of leaving the factory and are only exposed during use.

3： Can testing be saved? Batch testing of items such as impact resistance and light transmittance requires equipment investment and time costs. A standardized factory will achieve batch traceability and report shipment with the goods; Low price suppliers often use one report for three years or even do not provide testing reports. For the purchaser, the lack of testing endorsement for the lenses means an implicit risk when sending the entire helmet for inspection.

The essence of price differences lies in the differences in raw material grades, process levels, and quality control inputs. It is recommended to request written confirmation from suppliers regarding the types of raw materials, molding processes, and surface treatments during procurement, and to request corresponding batch testing reports.