The instruction about not suitable for driving at night or other low-light conditions for sunglasses only, night vision glasses is for sure suitable for use at night or rainy day . Night vision glasses cut about 10% to 20% glare from headlight depends on environment. No such night vision glasses can block 100% glare of headlight because it is contrary to the theory of optics.
DUCO yellow night vision glasses will not only change light from white to yellow but also balance glare and increase brightness. It is surely better than naked eyes watching glare when drive in night .It is also recommended to use for driving in rainy day or dusk.
How to measure your prescription frames for DUCO sunglasses:
1- Measure the widest part of your prescription frames left to right, this is the "width". Next measure the height of the lens with frame included.
2- Choose the DUCO frame (below) that is slightly larger in width and height than your frame measurements.
If your frame width is less than 136mm（5.35inches）,height is less than 37mm（1.45inches）, please choose M size.
If your frame width is longer than 136mm（5.35inches）, shorter than 142mm（5.59inches）;height is less than 37mm（1.45inches）, please choose L size.
If your frame width is longer than 142mm（5.59inches）,OR height is larger than 37mm（1.45inches）,please DON'T choose it.
Glasses X1, glasses case X1, glasses cloth X1,glasses bag X1.