[TheForge] Progressive lenses (was: bifocal safety glasses)

Bruce Freeman FREEMAB at pt.fdah.com
Tue Jan 3 08:36:26 EST 2006 

Progressives can be a problem.   Know what you're getting before you spend a bundle on them.

The problem is that some genius decided we only use the center of our glasses - not the edges, so progressives commonly have a useful area that's more-or-less funnel-shaped - broad at the top, and narrowing as it goes down to the "close vision" section.  The lens outside this area is useless.  That is not true of all progressives, but you have to pay more for better ones.

This may not seem like a problem at first, but it turns out that peripheral vision is also used by the brain for depth perception.  Anything that restricts your perpheral vision screws up your depth perception.

Bruce
NJ

>>> ironstash at comcast.net 12/23/2005 8:18:23 PM >>>
I wear progressive lenses instead of bi focals. They have a varying focal length 
instead of constant length. 

Works for me

Alfred


 -------------- Original message ----------------------
From: <debmiller at fuse.net>
> I can ditto Jim's comments. 
> 
> I have bought the bifocal safety glasses, very cool.
> 
> Plus their work clothes fit well, and with a gut like mine!!
> 
> Ray
> Cincinnati
> 
> 
> ---- Jim Pigott <jpigott at jam.rr.com> wrote: 
> > 
> > 
> > 
> > 
> > 
> > This should work better. 
> > >From here click on 'eyewear, hearing and knee protection" and from here
> > click on 'show all' and you will see the clear lens also. I buy a lot of
> > things from them and have always been pleased.
> > 
> > 
> > http://www.duluthtrading.com/store/tools_shop/tools_shop.aspx 
> > 
> > 
> > 
> > 
> > 
> > 
> > -----Original Message-----
> > From: theforge-bounces at mailman.qth.net 
> > [mailto:theforge-bounces at mailman.qth.net] On Behalf Of Jim Pigott
> > Sent: Friday, December 23, 2005 8:03 AM
> > To: 'Sponsored by ABANA'
> > Subject: RE: [TheForge] Re: bifocal safety glasses
> > 
> > 
> > These are good. 
> > 
> > http://www.duluthtrading.com/?processor=content&asp_processor=&action=nopost 
> > &p_keyword=&p_contenttype=&sectionpath=1/26/145&pageid=135&categoryid=&categ
> > oryname=&filter=&pg=0
> > 
> > 
> > -----Original Message-----
> > From: theforge-bounces at mailman.qth.net 
> > [mailto:theforge-bounces at mailman.qth.net] On Behalf Of Ralph Sproul
> > Sent: Friday, December 23, 2005 7:25 AM
> > To: Sponsored by ABANA
> > Subject: RE: [TheForge] Re: bifocal safety glasses
> > 
> > 	Interesting that Walmart and Sears along with welding suppliers are
> > now
> > into catering the craftsman that are getting older .......must be a lot of
> > us.
> > 
> > 	By the way - what is the cost at Sears and Walmart for the safety
> > glasses?
> > 
> > 	The thing about advantage gas is the glasses are safety glasses and
> > then a
> > bifocal in them as well are for close up work.
> >  I find I can't see a dam thing without prescription glasses and
> > Lenscrafters wanted $426 last time I checked for a set of prescription
> > safety glasses.  These polycarbonate glasses that Advantage Gas sells are
> > full time magnifyer glasses in different powers, and you can glue on a set
> > of lined bifocal lenses and the magnifying glasses are $16......and the glue
> > on bifocal discs are about $10.
> > 
> > 	I certainly don't loose any sleep over smashing, scratching, or weld
> > spattering a $16-26 set of glasses like I would a $426 set !  I'm
> > notoriously stupid and have ruined more sunglasses and regular glasses
> > around job sites - that I really appreciate the cheaper option, as I know
> > me.
> > 
> > 	........and yes, I did try those glasses holders that go around your
> > neck.......but the weld spatter ruined the glasses - so I didn't gain much
> > there.
> > 
> > 	I've seen the option of standard safety glasses with bifocals for
> > close up
> > work, but to get magnifyer lenses with bifocals had always been a
> > optomitrist expense.  I feel pretty dumb when I have a set of magnifyers in
> > my welding helmet - so I set down my safety glasses to weld something - then
> > smash the glasses I'd set down closing a lid on the set I had set
> > down.......but like I say - it's much better than it used to be cost wise.
> > 
> > 	...........Maybe I wasn't supposed to say that..........I'm sure no
> > one
> > else has done that!   :-)
> > 
> > 	Now that I've fessed up and make all you guys look good!  I'm off to
> > finish
> > up two more presents ......and I hope you all have a nice holiday in which
> > ever way you celebrate it.
> > 
> > Ralph
> > 
> > -----Original Message-----
> > From: theforge-bounces at mailman.qth.net 
> > [mailto:theforge-bounces at mailman.qth.net]On Behalf Of LrdThorolf at aol.com 
> > Sent: Friday, December 23, 2005 7:29 AM
> > To: theforge at mailman.qth.net 
> > Subject: [TheForge] Re: bifocal safety glasses
> > 
> > 
> > I where bifocals glasses and at Walmart the last time i got my   glasses I
> > got safety  glasses and frames so that i could work  in  them and have them
> > for
> > when I  make it to  any black smith  events. They  came with  side shields
> > too.
> > 
> > Later Ike
> > Pan's Forge
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