Zenni, like most retailers, does in fact have a notes section for "special
instructions."
It's available during checkout. I always use it to specify my off-center
monocular PD.
-- Chuck Knight
On Sat, Feb 14, 2009 at 11:21 AM, Firewalker <[email protected]>wrote:
>
> What I don't understand is why Zenni doesn't just ask people how they
> wear their glasses. They don't even have a place to add notes where
> you can ask them to lower or raise the seg height.
> On Global, they ask during the order process if you wear them very
> close to your face, slightly away (most people) or further down your
> nose.
> Too bad they don't pay attention to that, as I just got a pair of
> multi's from Global, and the seg height is a full 5mm to high so I
> have to wear them further down my nose than I'm used to. :(
>
> On Feb 7, 12:46 am, Chuck Knight <[email protected]> wrote:
> > I asked this, of Zenni, a long time ago. Here's what they told me.
> >
> > They start with an assumption that the glasses are relatively centered
> > (vertically) on your face, or that they can be adjusted to be this way.
> The
> > nosepads on metal frame glasses are more forgiving than other styles, in
> > this respect.
> >
> > For progressives, they place the corridor at 49% of the lens height, so
> that
> > it falls *just* below the middle of the lens. It's a "one size fits
> MOST"
> > approach...by adjusting the nosepads they can adjust where they sit on
> your
> > face, and can be positioned correctly, in this way.
> >
> > From memory, they position the lined bifocals at 40% of lens height.
> >
> > This seems to work for a LOT of people...and is *way* simpler than the
> > complicated measurements most use.
> >
> > -- Chuck Knight
> >
> >
> >
> > On Fri, Feb 6, 2009 at 10:38 AM, J. Webber <[email protected]>
> wrote:
> > > I am wondering how these companies decide where to start a progressive
> (er,
> > > progressing),
> > > and how they determine where to put the line in a lined-bifocal.
> Doesn't
> > > this depend on the way
> > > a frame fits a particular face?- Hide quoted text -
> >
> > - Show quoted text -
>
> >
>
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