Night driving glasses

[busterb]

Thanks, Spex for that info.

[Spexxvet]

Originally Posted by busterb

Thanks, Spex for that info.

My pleasure!

[Beest]

About a year ago ordered some cheap yellow lens glasses fro winter driving, but they came from China on the slow boat and didn't arrive until after the snow had gone.

I tried them at night and they made a bit of difference but not much,
they were great in the rain on the highway with all the spray.

and today I got to try them in the blowing snow, they were very helpful, made things clearer and less eye strain.

[Beest]

"Yellow 'Night Driving' lenses have been shown to provide no benefit in seeing ability at night. They are even hazardous, because they give the driver a feeling of seeing better, which no one has yet been able to explain. Studies have shown that they actually impair visual performance and retard glare recovery. Many promoters have made unfounded claims for the ability of amber to improve night vision. They have employed mass solicitation, usually by mail. The Federal Trade Commission has correctly ruled that such practices are illegal since the lenses do not perform as claimed." - Forensic Aspects of Vision and Highway Safety", Merrill J. Allen, O.D., Ph.D., Et al.

From http://www.laramyk.com/resources/edu...iving-glasses/

Why would feel you can see better if you can't.

Surely the perception that you can see better, means you are perceiving better.

[glatt]

Don't know if they still do, but French cars used to have yellow headlights for presumably the same reason.

[footfootfoot]

Originally Posted by glatt

Don't know if they still do, but French cars used to have yellow headlights for presumably the same reason.

I thought it was to keep the bugs away. hahaha

I understand the point of yellow and amber lenses is to filter out the portions of the blue spectrum which doesn't do it for us humans (spexx, weigh in here?) and they are mostly effective at twilight or on overcast days.

I'm thinking overcast days must have more blue light (higher color temp. I'll look that up) and by filtering it out things seems brighter because we see blue light as darker?

maybe?

They increase the contrast and that alone takes strain off the eyes. In B&W photography those color lenses help to render the sky a darker shade of gray since B&W film is somewhat more blue sensitive than our eyes.

[glatt]

I have much more trouble reading blue signs at night. They are noticeably more blurry to me.