Adding hard film is necessary for plastic discountglasses lenses such as PC and resin, as they are used to compensate for physical defects in the lens material and improve the lens's wear resistance.

Anti-reflective film, also known as anti-reflective film, is used to reduce light reflection and increase light transmittance. The anti-fouling film is the most mysterious. Different brands use different technologies on eyeglass mart, but most of them claim to be waterproof, anti-fog, dustproof, and anti-fingerprint. It is recommended to make choices based on the brand, which will be more secure.

In addition, besides the three types of film layers mentioned above, the functions of other film layers such as anti-blue light film, anti-ultraviolet film, and anti-radiation film are difficult to judge, and there will be significant differences between different brands. If the budget is limited, these additional film layers can be disregarded.

Different color coating differences:

Blue film: Lenses coated with blue film have excellent radiation resistance. People who work with computer screens for a long time can use blue film lenses to prevent eye fatigue.

Green film: Green film has good light transmittance, is comfortable to wear with green film eyeglass online lenses, and can see things clearly, naturally, and realistically. It is suitable for people with high color requirements.

Yellow green film: Yellow green film further improves the transmittance based on the green film, and this color-coated lens is very easy to match with the frame.

Gold film: Lens coated with gold film have a particularly high transmittance, and also have waterproof, dustproof, and anti-fog effects, making it a multifunctional coating layer.

Purple film and red film: The main function is to make the lens look more beautiful, which belongs to decorative coating.