Admittedly it doesn't have a knob...but would a slide lever be acceptable? http://www.homotron.net/2008/08/video_adaptive_eyewear_adjusta.html
If you want something a little fancier, there's also electro-optics. They would have your little knob. http://www.pixeloptics.com/pages/electronic_eyewear.html -- Chuck Knight On Fri, Jun 18, 2010 at 12:28 AM, carrots <[email protected]>wrote: > Hi Beaugrand, > > Hope you'r not minding my thoughts on your subject ;) > > You"r wishing for a "little knob" on your glasses to accommodate " on > the spot" perfect sight? Search and wish no further. Put ordinary and > bifocals in the treasure chest, and switch to progressives. I'm a > happy wearer of progressives and have been so for years. They do it > all for me, far, near, midfield, sidefield whatever I wish for and all > of that in just one frame. > Last year I became a first time online buyer and ordered a pair of Kam > Dhilon frameless glasses at Coastalcontacts. On top of the perfect > lenses they put in the frame, the frame ls a-ma-zing! It can be over > stretched, sit on, stand on, twisted, folded, etc etc. They are like a > pair of eyes on sticks, and they do the trick for me. Because the > frame is light, I forget I'm wearing glasses and so do others when I'm > at "close encounters" if you get my drift..... > > Some people have problems adjusting to progressives, I think the > secret is not choosing a frame with large lenses. > > Ah well, just pondering over the subject on a sunny morning sipping my > coffee. > > Grz carrots > > > On 16 jun, 10:06, Beaugrand®™© <[email protected]> wrote: > > PD can sometimes be given as a "mono" fraction, such as 32/34; that's > > the distance from the center of the pupil to the center of the bridge > > of the nose, the first number corresponding to the right eye, the > > second to the left. Ordinarily it's written like R32 L34. > > For progressives or bifocals (some of us can't wear progressives) the > > larger number (which I assume would be written first, such as 66/63) > > would be for "distance," the other for "reading," or, in my case, > > "computer," since, for reading, I hold a book closer to my eyes than I > > would view a computer screen. > > > > If I sit at a computer screen I grab my "computer glasses," for > > reading I grab my "reading glasses," if I drive my car I grab my > > "driving glasses," since, thanks to Ira and GlassyEyes, I can now > > afford to have several of each kind. > > > > I actually do have some bifocals that I ordinarily wear socially, or > > when I can't carry a specialized pair, but it's such a joy to be able > > to put on my reading glasses so I can read the price label on the > > bottom shelf at the grocery without straining my neck looking through > > that little "reading" window at the bottom of the bifocal lens. > > > > What I really need is glasses that would adjust by twisting a little > > knob on the side to change the refractive value of the lens... > > > > WHL > > > > Character is doing the right thing when no one is watching. > > > > On Jun 15, 2:12 pm, powrwrap <[email protected]> wrote: > > > > > > > > > On Jun 13, 11:53 am, Sasha <[email protected]> wrote: > > > > > > Re. PD: I learned this week that PD is often given as a fraction, > such > > > > as 58/61. > > > > The second, higher number is the one to use for progressives, the > > > > lower for reading glasses. > > > > Or so I'm told. > > > > > > Anyone know otherwise? > > > > > Almost got it. The number is not a fraction, it's actually two > > > numbers. Only progressives have 2 PD numbers. The higher number is for > > > distance vision, the lower number is for reading. > > -- > Check us out at the oft-updated http://glassyeyes.blogspot.com! > > You received this message because you are subscribed to the Google Groups > "GlassyEyes" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/glassyeyes?hl=en > -- Check us out at the oft-updated http://glassyeyes.blogspot.com! You received this message because you are subscribed to the Google Groups "GlassyEyes" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/glassyeyes?hl=en
