These symbols are usually engraved on the edges of unpolished lenses and will be removed after polishing, which will not affect the light transmission and use of lenses. ?

Method:

1, high-concentration alcohol, rub hard.

2, nail polish, note that this is for glass lenses, if plastic lenses will be embarrassed.

3. banana oil, this works. But it is flammable, so use it carefully and pay attention to safety.

4. Cover the trademark with a paper towel with essential balm. After 5 minutes, gently press the paper towel with your nails.