Thanks for the info James. I'll let you know if I can find anything. I want trifocals that look like bifocals... the bifocal and trifocal areas being progressive, but separated from the distance vision. I would think that any standard blank for a bifocal or trifocal would work, the problem being in the software to run the machine to do the grinding, I would think...
Dan -----Original Message----- From: James McCourt, Ph.D. [mailto:[email protected]] Sent: Tuesday, October 24, 2006 5:45 PM To: [email protected] Subject: Re: CS>Eyeglass lens types Most progressives are problems. Varilux is better these days but still blurred compared to Zeiss. Zeiss is far better for only slightly more money. I find the best solution is Zeiss on a frame that has a nosepiece that moves the lenses higher for reading and close work. Such frames started in Austrailia a few years ago but are now in the US. You may also like what they call a "Double D." These have another bifocal inverted and set at the 12 oclock position so that commercial pilots and focus on overhead switch panels. Also be aware that fast service labs too frequently mess up your prescription; even though the industry "allowable" error is plus/minus .125 diopters. Frankly .125d is sloppy enough to be irritating; so tell them to get it right on your prescription and then check it there and by an outside firm when it arrives. I deal with a quality medical provider in a good area and they still miss the prescription about 50% and have twice tried to sneak me Varilux. BTW plastic is not a clear as glass, and the problem with your exact request is that such a blank on which to grind may not be in the US directory. Let us know if you find a source. ----- Original Message ----- From: "Dan Nave" <[email protected]> To: <[email protected]> Sent: Tuesday, October 24, 2006 1:49 PM Subject: CS>Eyeglass lens types > I am trying to find eye glass lenses that are made like trifocals except > that the intermediate and near vision area only are progressive (has a > line between the distance and intermediate portion but NO line between > the bifocal and trifocal portion only). I can't believe that they don't > make this type!!! > > Has anyone heard of something like this? (NOT regular progressives, > which I think are crap!) > > Dan > > -- The Silver List is a moderated forum for discussing Colloidal Silver. Instructions for unsubscribing are posted at: http://silverlist.org To post, address your message to: [email protected] Address Off-Topic messages to: [email protected] The Silver List and Off Topic List archives are currently down... List maintainer: Mike Devour <[email protected]>
