> The website had 2 pictures displayed to show how much more one can see
> with AR coated eyeglasses; a thread a few years back said that there was
> more light getting thru a pair eyeglasses using AR coatings.
> Now, the website's pics was a headon shot of a car at night with the
> headlights on & a person standing back by the door. With AR coating,
> the area around the headlights do show up clearer BUT, from my perspective,
> more of the person was visible in the pic without the AR coating.
> So, I'm just guessing that flare is making the more of the person visible
> when not AR is applied if all else was equal. Don't really understand
> why that is so; could be psycological that when objects are "brighter", it
> appears that one can see more. My AR coated lenses seem to make objects
> less "bright" so that it seems that the objects are "dimmer" than when
> glare/flare is present.

> In article <3_SdnV2pJ_QM1yHVnZ2dnUVZ_sninZ2d[at]comcast.com> ,
> nobody <annonymous[at]none.com> wrote:
> > I was wondering since the AR lenses is supposed to allow more light to
> > come thru. On a website that had a before & after effect of AR, I felt
> > that I saw more objects without AR than with AR; I attributed that the
> > glare bounced more light to the object (person) standing next to the
> > car even if the headlight was glaring. I got AR lenses anyway......
> > > I need to trackdown that website as it could have been my old monitor; but
> > if I can see more things with glare than without, glare is the way to go.
> I read your post twice and still have some trouble understanding what
> you are trying to say. For ordinary glass and typical plastic, about 4%
> of incident light is reflected and lost from each surface or 8% from the
> front and back of the lens combined. That is not really very much. The
> problem often created is that the reflections cause unwanted images and
> confusion. In photography where there can easily be six to eight
> glass-air interfaces in a lens, that can be a lot of light loss and
> degradation of the image on the film or sensor. In photography, that is
> called flare. Certainly a bright light behind you can reflect off of
> your lens surfaces into your eye.
> There are many different kinds of AR coatings. I am not very familiar
> with those use on eyeglass lenses. The simplest ones will reduce
> reflectivity to about 1% per surface. Many more tricks at greater
> expense can be performed using multilayer AR coatings. Is it worth it? I
> think that is highly subjective.
> By the way, multilayer coatings can be used to color glasses,
> particularly sunglasses. That usually ends up reducing transmission
> through the lens be increasing reflectivity at some wavelengths.
> Bill

> I was wondering since the AR lenses is supposed to allow more light to
> come thru. On a website that had a before & after effect of AR, I felt
> that I saw more objects without AR than with AR; I attributed that the
> glare bounced more light to the object (person) standing next to the
> car even if the headlight was glaring. I got AR lenses anyway......
> I need to trackdown that website as it could have been my old monitor; but
> if I can see more things with glare than without, glare is the way to go.

> In article <9vGdnSz-M-59iyHVnZ2dnUVZ_qPinZ2d[at]comcast.com> ,
> nobody <annonymous[at]none.com> wrote:
> > I'll be having cataract surgery & have read info on cataracts & its
> > effect on limiting night vision. Wondering if the yellow tinted
> > "night driving glasses" will help with night driving.
> > > I guess the night driving glasses may cut down glare but have doubts
> > about the visibility of objects.
> > > Anyone know or have experience with the night driving glasses that
> > is being advertised?
> I am not a health professional. My background is in optics.
> Most eyeglasses DO NOT cut down on glare compared to light useful for
> vision. Polarized lenses can do so at the expense of losing more than
> 50% of the light. They can cut down on some glare reflected off of the
> road, especially from the sun at some times of the day,
> Yellow tints can improve contrast under some circumstances. That is why
> they used to be used a lot in black and white photography.
> All in all, my educated guess is that you want all the light you can get
> when driving dark roads at night. I would be open to changing my mind if
> presented with experimental data showing benefit. Watch out for sellers'
> hype.
> Bill

> I'll be having cataract surgery & have read info on cataracts & its
> effect on limiting night vision. Wondering if the yellow tinted
> "night driving glasses" will help with night driving.
> I guess the night driving glasses may cut down glare but have doubts
> about the visibility of objects.
> Anyone know or have experience with the night driving glasses that
> is being advertised?

> I'll be having cataract surgery & have read info on cataracts & its
> effect on limiting night vision. Wondering if the yellow tinted
> "night driving glasses" will help with night driving.