I know that Light indexes for lenses run from 0 to 4 and that light index 4 lenses are not recommended for driving, but what does Oakley make which is light index 4?

I've just got a pair of double black Monster Dogs from HM at the bay and they certainly seem a lot darker than regular black iridium (will try and get a photo or two when I get home comparing the two lenses side by side). Might these be light index 4 and does that mean I shouldn't wear them while driving?

As far as I know, Oakley doesn't do Index 4 lenses.

Not legal I don't think. Anything below 9%

If you ask the legal department, I think they'd have all lenses come with the 'do not use for driving' disclaimer. And yet how many of us are out there risking our lives on a daily basis with G26, ABIP and so on....

lol i see it now....just like every coffee cup in America is labeled with contents may be hot....all glasses will be marked lenses might not be suitable for driving....then we will feel safe...or not.

Difference being, it's hard to draw a line between 'too-contrasty' opposed to darkness which can be assigned a numerical value and then capped.

Hey whats wrong with ABIP lenses?? I didn't think that tint was particularly bad and didn't know they came with a warning???

Also - I figure the liquid metal lenses is probably less than 9%.

They can alter colors and confuse people when they see red lights, since I guess one person couldn't remember what order the lights were on a stop light or something silly.

Liquid Metal lenses might be darker, but customx-metal isn't a national company that is going to get much scrutiny.

Does anyone have an idea wether this a US thing? Because before I turned to Oakley I've definitely had some (european?) markedly darker lenses. I wouldn't mind if Oakley made some darker lenses because now and again I still have to squint.

Probably, the lawsuits here make for some odd procedures.

Index 4 is used for Glacier climbing and so on. I know back in my days Cebe had some.