The invention relates to a
blue light filtering, water and oil
dirt preventing and wear resisting lens and a preparation method thereof. The lens comprises a substrate, and the inner surface and the outer surface of the substrate are provided with first films, second films, third films, fourth films and fifth films sequentially and symmetrically from inside to outside. The first films are
titanium oxide layers, and the thickness ranges from 10 nm to 100 nm. The second films are
silicon dioxide
layers, and the thickness ranges from 50 nm to 100 nm. The third films are
metal layers, and the thickness ranges from 5 nm to 20 nm. The fourth films are high-
hardness layers, and the thickness ranges from 10 nm to 50 nm. The fifth films are
fluoride layers, and the thickness ranges from 3 nm to 10 nm. The preparation method comprises the following steps that 1, the substrate is washed; 2, the inner surface and the outer surface of the substrate are coated with the films respectively. The lens can effectively filter out 33% of harmful
blue light and dazzling light or above, visual fatigue can be effectively relieved, the
wear resistance of the lens can be remarkably improved through the high-
hardness layers, and the
fluoride layers have the good hydrophobicity and oil
dirt preventing function.