Stock CR-39 Power Range

[icare]

I need a bit of help confirming the finished stock power range of Transitions. Can anyone please guide me to a resource or quote the stock availability of the product? I think it's 75mm, but perhaps there are a few sources.

My lab told me that the 'overall' power (sphere plus cyl) can't be over -4.00. That sounds weird to me and I'm wondering if they are uninformed or misleading me.

[Jim Schafer]

Good Morning ICARE,
Our stock 1.50 FSV range is -4.00 to +4.00 with cylinder out to -2.00.
The minus lenses are 70mm and the plus range 65mm diameters.

Semi-Finished Std Index SV and Segmented generics are 75 mm.

have a great day,
Jim

[icare]

Thank you very much.

I was told that with a

-3.50 -.075 and
-3.25 -0.50

that the OD would have to be surfaced because it totals over -4.00 sph+cyl!

Ughh.

[Framebender]

Something about 4 diopters total power. If I remember right I couldn't get a -2.75 -1.50 or -1.75. Something like that. Is that not right??!?

Thanks for your time and attention!!

:cheers:

[MarcE]

I haven't checked the lens catalog, but that seems to be right. 4.00 D of TOTAL power. I checked, SOLA, Essilor, and even SuperFin Indochromic.

In stock form, your photochromic options for this Rx are:
Sunsensors 1.56,
Hoya Phoenix Trans 5, and (-6.00 total power)
Essilor Poly Trans 5 (-6.00 total power)

LBI's generic "1.56 QuickChange" may be available also, but I don't have my range charts with me. Other generics may be available.

[rinselberg]

KODAK InstaShades 1.56 EvoClear® Single Vision Gray & Brown

1.56 SunSensors® 70 & 74 Gray & Brown SV

Source: SignetArmorlite

??


Could that next step up the career ladder get you in "over your head"? Explore this topic under the new post title An Inconvenient Promotion.