Does anyone do franklin split bifocals? We have done them before but very time consuming.I have a few ideas of making it easier but neve put them into pratice any ideas folks?
Does anyone do franklin split bifocals? We have done them before but very time consuming.I have a few ideas of making it easier but neve put them into pratice any ideas folks?
Talk to Jacqui here on the forums. She's our resident expert on these.
There are rules. Knowing those are easy. There are exceptions to the rules. Knowing those are easy. Knowing when to use them is slightly less easy. There are exceptions to the exceptions. Knowing those is a little more tricky, and know when to use those is even more so. Our industry is FULL of all of the above.
Hi there :D
Yes we make Franklins, hemianoptics, prism segs and a few other similar goodies. Send me a PM on this :D
WFruit: Chip Anderson and Clive Noble are also experts at this, they have both taught me more.
Last edited by Jacqui; 12-18-2010 at 09:04 AM.
Thanks Jacqui, that's good to know. You're the one I see posting most about them, so I mentioned you first. ;)
There are rules. Knowing those are easy. There are exceptions to the rules. Knowing those are easy. Knowing when to use them is slightly less easy. There are exceptions to the exceptions. Knowing those is a little more tricky, and know when to use those is even more so. Our industry is FULL of all of the above.
Hi Rob,
Yes, I'm still in the market for Franklins even though I'm semi retired.... and they are still laboriously made by hand from 4 individual s/v lenses... I've even done Trifocals....
If there's anything specific you need, just PM me... Happy Holidays to all.............
Good to hear from you, Clive :D
You may also want to look at this blog post about me. I am attempting to set up a lab to do nothing but Franklins, hemianoptics, etc.
http://theopticalvisionsite.com/eye-...akcat/#respond
Thanks Clive how do you keep the seg line straight ?
Gotta hold your mouth just right.:bbg:
DragonlensmanWV N.A.O.L.
"There is nothing patriotic about hating your government or pretending you can hate your government but love your country."
sorry to sideline the post. "Chip Anderson is an expert at this" . So why is an expert on something like this banned ?
"Always laugh when you can. It is a cheap medicine"
Lord Byron
Take a photo tour of Cape Cod and the Islands!
www.capecodphotoalbum.com
Holy thread resurrection, Batman! I have a patient today who needs a high plus bifocal with 2.5 base out in distance only in each eye, so is getting a Franklin Split. I was about to send this away to a specialist lab in the UK but fancy giving it a go first before I do. I've had a practice run at Franklins a while ago which looked pretty good, but I just used old rejected lenses with no consideration for the Rx. So my question is this (and I hope Jacqui is still about and has input): with the split lying on horizontal centre line, how do you centre the individual parts of the lenses vertically? Do you block both lenses with their OCs on HCL and then grind them down, or do you block the distance lens with OC 1/4 down from top of frame and the reading 1/4 up from the bottom so that both parts have an obvious OC?
Sending a PM on this
For anyone else that's interested, my default on O.C. placement is 3 above for the read and on or 1/2 below for the read.
What devices do you use to cut the lenses cleanly and evenly?
I use a small table saw (4 inch blade) from Dremel to do the initial rough cut. Others use a band saw, jewlers saw or just grind off the excess on a disk sander.
For the final accurate finish I use a machne from another industry that was adapted by me, this makes the angles exact and the surface dead flat.. This also works on hemianoptic and macular degeneration lenses. Chip Anderson uses a flat file mounted on the bench and hand movement, leaves a flat suface but the angles are hard to hold. Clive Noble uses a hand edger.
We adapted an old Coburn 601 surfacer, took the overhead arm off, removed the reciprocating motor, had a new tank built out of stainless, plus a ruler mount. We use a facet making diamond for surfacing the flats. I can take a picture if anyone is interested.
What's with all the equipment? I just did it by hand!
I marked my horizontal lines on my four lenses, ground most of the excess off using a bench grinder, then finished off the edges by rubbing the lenses across a sheet of sandpaper placed on a worktop. Perfectly smooth and straight edges.
I bonded them with epoxy resin and the job was done next day for the patient, who commented they were better than her previous pair which came from Norville, and without the 3 week wait. I was more than delighted by that!
I used to be a cabinet maker and so I'm used to fine handwork.
Haha I know Jacqui, I was only messing!
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