lens thickness and weight + (rimless) frames

Hello Everybody!

I'm looking for the best possible (aspheric) lens (thinnest, lightest, best
possible optics) available. Here in Hungary, the available lens are from
Zeiss, Hoya, (Essilor)and Sola. (This is the order probably) The problem is
that i cannot find all information regarding edge thickness, centre
thickness, weight at a given diopter (minus (myope)) and lens diameter, so
it is not possible to me to compare them. I would be happy if you could
supply me with these informations about the following lens: (i didn't want
to include lens with higher index values in the list, because of their low
Abbe (is it very bad?the finishing (coat) of the lens affect it?)):

Zeiss Clarlet 1.6 AS
Hoya Eyas 1.6 AS
Sola Finalite 1.6 AS (read here some info on that. CentreTickness is 1.1mm?)

That is the list.You can extend it if you can )

And something about the frames too...Is there a frame out there, that won't
slip down my nose (when i sweat)? I'm thinking of a special anatomic arm
configuration or other alternatives.( The weight is the first factor in that
i guess) By the weight ). Are rimless frame good or bad? I've read about
Hoya's so called Pinfeel. What do you think of that?Is it worth?

Thanks in advantage,

Balazs

 

The lens thickness depends on your particular Rx as well as the lens
material. Although center thickness can usually be determined (with your
specific Rx), the edge thickness usually depends on the frame selected since
the lens is cut to fit the frame. If you just want the edge thickness for
comparison purposes of the various materials, that is OK, but the actual
edge thickness will depend somewhat on the frame size and lens placement in
the frame.

To select the right frame, talk to various opticians about your problems
with slippage and then use the one that seems to know how to solve the
problem. It's not just a frame issue (although the frame is a factor) but it
also depends on how the optician adjusts the frame for you face. Don't use
an optician that does not wear glasses or is too young to have any good
experience.

 

Dear Mark!

We are coming closer... ) , but I still do not know the edge thickness (at
a given Rx (diopter) and diameter). I guess (now) that it is not that
important anyway, the differences should not be significant. (still
interested in these small differences) The lightest is possibly the
Finalite, and it has a high Abbe
(but Zeiss Clarlet 1.6 AS has an Abbe of 42 as far as I know. Look here:
http://www.zeiss.de/de/ophtalmic/comp/home_e.nsf/6f2a76c25f0237fbc12566fe003
b25ff/49d8bc7d3541db94c1256bc00039d9bb?OpenDocument )
Information on the Hoya lens are on the site: www.hoya.co.uk for example
with a simulation of the thickness and weight within given values. I like
that.)

I understand the importance of frame fitting, but that is not easy and
enough. Here I didn't find an optic shop, where you can select the frame by
size from a catalog. (Of course you also have to try it on.) The shape of
the frame is just on thing, the more important is its anatmoic fitting. You
menitioned the importance of the temples. The old fashioned temples had
cable ends.Why?Because the nose pads were invented in 1920.Until that, the
temple had to hold the "whole" frame. (I found that, as I was searching the
net.Look
ttp://www.eyeglasseswarehouse.com/20th-century-eyeglasses.html -nice site)
I also had earlier (12 years ago or more, when I began to wear) spectacles
with cable ends. I must say I didn't like them, because I didn't have to
(want to) wear glasses all the time. But now I understand its importance and
benefits. The coating of the temples and the nose pads (silicone) are also
highly considerable.

One more question. Which manufacturers coating is the best (most durable and
best optics)?

 

Sola ASL 1.6 - abbe 42, density 1.22g/cm3
Zeiss MR7 1.6 - abbe 36, density 1.36g/cm3
Hoya Eyas 1.6 - abbe 41, density 1.32g/cm3

Others:
Seiko Super Luscious 1.6 - abbe 42, density 1.22g/cm3

My recent experience with SPX/titanium Silhouette frames with Sola
ViZio 1.66 and Hoya SummitECP 1.7 lenses, is that these combinations
are so light that the gentle pressure of the temples at the sides of
my head is sufficient to hold them in place in normal use (but not for
sports, where I wear a cord).

Hoya claims for their new Super HiVision AR coating a scratch
resistance of 12.43 on the Bayer abrasion test, compared with a
resistance of 12-14 for glass. Noteworthy for rimless is Hoya's 1.7
material for which they claim a tensile strength 3 times that of
CR-39. Hoya offers this material/coating combination with a two-year
warranty against breakage in drill mount frames, a policy without peer
when I was searching for new lenses a few months ago.. Both products
were at the time available in the SummitECP progressive and scheduled
to be released in other Hoya designs during 2003.