White Poloroid Lenses

[Graduate]

I know if you cross to poloroid sunglass at right angles it darkens.

How do you test two white CR 39 lenses to know if they are poloroid?

[culland]

I know if you cross to poloroid sunglass at right angles it darkens.

How do you test two white CR 39 lenses to know if they are poloroid?

How do you have a "White" polarized lens? The effectiveness of a lenses polarization is affected by the darkness of the polarizing film within the lens. Even lighter shades of polarized lenses aren't as effective at cutting glare as a darker polarized lens. I'm not sure how a "White" polarized lens is possible??? Someone else may shed more light on this if I'm way off, but I don't see this being possible.

[chip anderson]

Test: If it's white, it ain't polarized.

[Graduate]

How do you have a "White" polarized lens? The effectiveness of a lenses polarization is affected by the darkness of the polarizing film within the lens. Even lighter shades of polarized lenses aren't as effective at cutting glare as a darker polarized lens. I'm not sure how a "White" polarized lens is possible??? Someone else may shed more light on this if I'm way off, but I don't see this being possible.

i was thinking the same and you have confirmed there can be no such thing as clear white CR39 poloroid.
Thanks.

[TPL]

I think White polarized lenses are to be prescribed in conjuction with single vision slab_off.

Seriously, polarization is only effective in tinted lenses, a clear polarized lens would acomplish nothing.

[hipoptical]

Yeah, but a clear, polarized, photochromic, anti-reflective, super-hydrophobic, anti-static, high impact, thin & light lens would solve many a head-ache.
Of course who would be able to afford them...
Base lens... $79
Polarized... $50
Photochromic..$75
Anti-Reflective$65
Super-hydro...$20
High, thin, light$50

Total... $339 (for single vision)

And then there's the frame.......
Oh, did you want a warranty on that?
I'd buy mine at Lenscrafters, and return them in exchange for another pair until I was happy.;)

[braheem24]

U guys, there are polar a, b and c, no point in ridiculing someone over what you may think may be a dumb question. I have never heard of a totally clear polar lens but u never know


to answer your second part, i would assume u take 2 polar whites and turn them 90 degrees apart to test it:hammer:

[Happylady]

I went to a seminar on polarized lenses and they explained that polarized lenses have to have a tint, it can't be done with a clear lens.