Which Lenses should I pick???

[Eddie G's]

I have a patient with a Rx:

OD +5.25-1.50x170
OS +5.00-2.00x015

Which of these Transitions lenses is gonna look the thinnest and best...

1. 1.53 Trivex Aspheric Transitions
2. 1.54 Transitions plastic
3. Poly Transitions

Thanks in advance,
Eddie G's

[hip chic]

My vote is for the Trivex, Aspheric lens. You have to put the customer in an aspheric design in that prescription....I'd want to use the highest index lens available in an aspheric design.


Of course, I'm always curious to see what my peers suggest.

hip chic

[JRS]

POLY Transitions is available in aspheric. If you want to go with the highest index - it's not Trivex (in those 3 choices)

[Andrew Weiss]

Mid-index Transitions is out, too thick. Poly aspheric Transitions is a good idea, but I'd be concerned, at that Rx, about chromatic abberation. So I'd go with Trivex aspheric here, ground with a thin-ish center (1.5 or even 1.2). I agree that aspheric will make a big difference here -- take it from a fellow hyperope.:p

[Eddie G's]

Thanks for the quick replies!!!
Ok I'm going with the TRIVEX aspherics.

My lab cannot get the Apheric Transition poly's.

:cheers:

[Robert Martellaro]

The lens that has the flattest_best form_true base curve will probably be the thinnest lens at the center. If the true base curves are all within +.75 diopter the aspheric poly would probably be the thinnest by a very small margin, probably too small to see in a small frame.

Robert

[For-Life]

Aspheric Poly Transitions. Absolutely no doubt in that. I cannot see a problem with the chromatic abberation, and from my experience, thinner than Trivex. I am surprised that your lab doesn't have an aspheric poly. I just use Airwear Aspheric.

[Cowboy]

I like the seiko 1.67 trans (it is aspheric). I had a similar rx that I put into a 48eye and it looked like a +2.00. I did a drilled with a +4.00ou with the 1.67 with AR (46 eye) about a year and some months ago, patient came in for yearly exam a couple weeks ago and they looked just as good as the day they went out.

My two cents for ya.

:cheers:
Cowboy

[sjthielen]

I agree with cowboy the seiko is a great lens for that rx. By the way material is going to make a difference in weight but not thickness in that Rx. size of frame and aspheric design will control thickness.

[Andrew Weiss]

I've always liked Seiko's aspheric design -- nice, large fitting button especially, and the material wears well, although I have had some yellowing and SRC peeling after 2 years with some patients. Of course I don't know what they're exposing their lenses to . . . :hammer:
Should be a good alternative to the Trivex, although the costs will probably be higher.

[chip anderson]

I also have had a Lot of Seiko 167 peal and craze and the time period before it happens seems to be getting shorter and shorter. Have not had this problem with the Varilux products in the same index although they are a bit proud of it.

Chip

[For-Life]

I have never been happy with the Seiko coatings. Essilor has a nice 1.67 and so does Nikon. If you are looking for transitions, I read that Zeiss has a 1.67 that will do the job in single vision.

[jofelk]

We never had a Seiko returned for "peeling". Is it the front factory coating or the back side lab applied coating?

[zonelinks2004]

According to me one should consult a good optician before taking any decision regarding the lens......

------------------------------------
http://www.zonelinks.com
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The Power Link Dimension

[Eddie G's]

The lenses turned out great!
:cheers:

Obviously a pair of Polycarb Asperics would have been thinner but the patient was impressed regardless with the Trivex Transitions.

Thanks again to all who replied... except for zonelinks :angry:

[Chris Ryser]

................. although I have had some yellowing and SRC peeling after 2 years with some patients. Of course I don't know what they're exposing their lenses to . . . :hammer:

I also have had a Lot of Seiko 167 peal and craze and the time period before it happens seems to be getting shorter and shorter. .................
Chip.

2 interesting comments. Crazing happens when the hard coat does not flex with the basic lens material, which happens under extreme heat or cold. Yellowing can be the lens itself or it could be the hard coat and is due mostly to UV influence,

Question:
Are they factory applied ahrd coats or lab applied backside coatings ?

Some hard coats can be removed and therefore the lens is saved. Yellowing is not reversibe but in today's age nobody should make lenses or hard coats that tend to go yellow.