New fitting method for progressives ??

**skirk1975** · 08-17-2010, 12:41 AM

I have heard something interesting today. A new fitting method for progressives. It's based on some of the freeform lenses out there. Some have a 2.5mm inset which is wider than 1.5 or 2 standard. Most opticians take a distance pd and subtract either 1.5 or 2 from the numbers for near. That's they way it's always been done.

Well, some are taking the near PD and then adding 2.5 for the distance. They want the near EXACT and feel the distance is clearly more forgiving.

Anyone familiar with this?

**Craig** · 08-17-2010, 06:46 AM

I have never heard of that, but would be interested to hear from the OD's and folks with much greater knowledge of the eye than myself. The real question is whiich method is more consistent. I doubt the latter as the ability to converge must be different between a -5.00 with a +1.00 add vs +3.00 with a +2.75 add.
I look forward to hearing back from our experts.

Craig

**Barry Santini** · 08-17-2010, 07:56 AM

Old news, and not valid without the DV Rx in place or calculated with prism effects of same factored in.

B

**Judy Canty** · 08-17-2010, 08:00 AM

I could be wrong, but weren't we taught to fit the older Varilux designs like that?

**uncut** · 08-17-2010, 10:57 AM

10. The SV and FS blanks have random prism in them."But Captain...We canna contrrol the prism when the Generator is travelling at warp speed!!"

09. A touch of nostalgia....we are calling the retro lens(to go with the retro frames) EXECUTIV BIFNEARVISIO!

08. The prism rings went missing. We think the courier has expanded the holes in his ear piercings with them.

07. The router won't lean over at all those angles.

06. We wanted to shave 30 seconds off our production time.

05. We want to charge you a buck more for this "new version".

04. The university student we hired for data entry discovered girls!

03. The old guy who used to hit the generator with a hammer.....retired on us.

02. The sofware people said that they haven't got that far in the programming.

and the number one reason for using the near PD for FF multifocals?.....

The high school kid we hired for the summer hacked the computers and on his last day mumbled something about "no access until he saw the keys for a new Porsche in his hand!!!