Ask which manufacturer of Bao Dao anti-blue lens is, and then contact the lens manufacturer to confirm whether the manufacturer has anti-blue patent and quality inspection report. If not, it must be fake. Generally, real anti-blue lenses will not have this problem. Unless it's fake.
Nowadays, many businesses take advantage of the fact that many people don't know about anti-blue light, and enter some inferior fakes with ultra-low prices and only one layer of color to pretend to be anti-blue light lenses for profit. So be careful.