Where i can buy a pair of driving glasses for my brother?

[glasses lens]

driving glasses with the light transmittance should be not less than 10%, and the evening it must be greater than 80%. Driver eyeglasses worn during day and night have different requirements. Now, there are many driver eyeglasses in the market which are suitable for daytime. And, my brother's favorite outdoor sport is diving, he likes to explore the underwater world, so he needs a high quality pair of glass for diving, who knows where can I get one?