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Re: Are anti-glare or anti-reflective lenses useful?

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Re: Are anti-glare or anti-reflective lenses useful?

Salmon Egg21 Dec 2006 05:06
On 12/20/06 8:06 PM, in article
1166674018.469403.141480@48g2000cwx.googlegroups.com, "midwest_46@yahoo.com"

> Hello. I am a 33-year-old male.
>
> I need to get a pair of glasses with the prescription -5.00, -5.00 for
> driving, watching movies in a theater, etc. Would it be useful to buy
> lenses that have anti-glare or anti-reflective coating on them?

Antiglare lenses have a polarized coating on them that ideally cuts out a
bit more than half of the light. In addition, it cuts out some reflected
light off of the pavement near what is the Brewster angle. Look that up in
Wikipedia. I personally use CHEAP clip-on polarized glasses for that
purpose.

> What exactly does this coating do?
>
[quoted text clipped - 8 lines]
> The coating can cost as much as an extra $75 for each pair of glasses.
> So, is the coating worth the price?

Antireflection coatings on glasses are nice but usually not durable. They
are anti-FLARE as opposed to anti-GLARE. That is, the typically 4% of light
at a lens air surface is reduced to about 1%. This lets more light get
through and reduces the multiple reflections that might be annoying.

I find antireflection coatings to be more useful in cameras where the stray
light can leave a permanent reminder on the picture. For spectacles, you can
often, but not always, move your head in a way to minimize the annoyance.

> Thanks for any information.
>
> John

-- Fermez le Bush

midwest_46@yahoo.com21 Dec 2006 04:06
Hello. I am a 33-year-old male.

I need to get a pair of glasses with the prescription -5.00, -5.00 for
driving, watching movies in a theater, etc. Would it be useful to buy
lenses that have anti-glare or anti-reflective coating on them?

What exactly does this coating do?

Also, I may buy another pair of glasses to use as reading glasses.
These glasses would be used for reading, computer use, etc. Would
anti-glare or anti-reflective coating be useful for these glasses?

I have had driving glasses and reading glasses before, and I don't
think I've ever had anti-glare coating before. I'm not sure, but I
don't think that not having this coating has been a problem.

The coating can cost as much as an extra $75 for each pair of glasses.
So, is the coating worth the price?

Thanks for any information.

John

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