It will not be obvious for some polarizing lens that have special features to test the polarized light.Such as night driving mirror,its lens color of the glass is relatively shallow and it is usually light yellow lenses.That will be a problem for UK men.We will see the lens color becomes dark yellow at 45 degrees when we do the tests.
The color of the glass after the test show that the colour should make the color of the surrounding environment is not distorted. You can observe the color of red, green, yellow and other objects before wearing sunglasses. And then observe the same object.The colors of the two observation can not be partial colors, otherwise it will reduce the ability to identify traffic lights. Lenses with different colors have different functions.UK men will choose the glasses that have normal colours. And I can tell that generally it is good at moderate depth which as grey, brown, green. And the color of the lens should be selected to see color distortion, high-definition of object edge and can effectively identify the different color lights.