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» Trad Gang.com » Main Forums » Prayers/Concerns/Honors/Ailments » Eyeglass lens material

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Author Topic: Eyeglass lens material
Yolla Bolly
Trad Bowhunter
Member # 7027

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Age is doing its thing, and the optician that has supplied my prescription glasses for decades now informs me that he can no longer order glass lenses with the light yellow contrasting tint. So I was wonder what others are using. My " critical needs" are ultraviolet protection, compatibility with optics, and good light transmission for low light situations. I use a couple of different polycarbonate polarized lenses for fishing, but read somewhere that the refractive index for those material is different that glass, so it creates some distortion when used with optics.
Any helpful experience?
Thanks

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"Son, yeh gotta learn the Tehama 3-step." Homer Whitten.

Posts: 603 | From: North California--way north | Registered: Aug 2005  |  IP: Logged | Report this post to a Moderator
pavan
Trad Bowhunter
Member # 21538

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I wear HD coated progressive lens glasses, they help with UV, but they are not as good in low light conditions as glass tinted yellow. They are also a plastic lens, glass is easier to maintain and not damage.

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Pavan

Posts: 5941 | From: Iowa | Registered: Oct 2009  |  IP: Logged | Report this post to a Moderator
McDave
CONTRIBUTOR 2018
Member # 10587

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The problem with polycarbonate lenses is that they are only truly in focus if you are looking directly at something. The further you glance to the side, the more out of focus they are. The old fashioned plastic lenses are a little thicker at the edges, but are more in focus when you glance to the side. Since we are looking through the lenses at an angle when we aim the bow, polycarbonate lenses are not really in focus. This would bother me, but evidently doesn't bother some other people, based on posts made when this subject has come up before.

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TGMM Family of the Bow

I'm a man, and I can change, if I have to, I guess.

Posts: 4282 | From: Sacramento, CA | Registered: Oct 2006  |  IP: Logged | Report this post to a Moderator
pavan
Trad Bowhunter
Member # 21538

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I have noticed that, mine are now left of center focus, so the reader part is in focus when I am playing guitar and reading sheet music which to my left. That really helps when shooting right handed, but hampers me when shooting left handed. My vision is nearly 20/20 with an astigmatism, so I take the glasses off sometimes, when I shoot left handed. It does not affect my aim, since I use the the secondary indirect method either way.

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Pavan

Posts: 5941 | From: Iowa | Registered: Oct 2009  |  IP: Logged | Report this post to a Moderator
   

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