Our lens scratch remover contains sodium hydroxide and disodium EDTA. It can quickly remove stains on the glasses， maintain the lenses， and restore the clarity of the glasses. The way to use it is very simple: first spray the cleaning solution on the lens， and then wipe it with the glasses cloth. After use， it can effectively remove the oil on the lens and dust on the nose holder of the lens frame， so that the whole glasses look new and make the vision clearer.