Does anyone have any ideas about how to get a stick on prism to adhere to a lens with an AR coating like advantage or alize? I had to do it with scotch tape and its less then appealing to me and the patient. Called the lab and they did'nt have any ideas, soooo...I turn to the experts..HELP!!!
Is it a fresnel prism that attatches to the back of the lens with water? If it's a temporary prism for test purposes perhaps you will end up having the prism ground in. The alize is quite slippery and nothing much sticks to it.
It is fresnel prism press on prism. Dr. is trynig to get this patients eyes to move and she will be changing it every two weeks to diffrent powers. I would love to have the prism ground in, but to have a Dr change every two weeks on a ar coated prog. We ain't paying for that!!:bbg:
there's always something new to learn on Optiboard. Never heard of attempting to do this. I thought about cleaning the lens real good and dry, then using some type of silicine type adhesive in very small drops(5 or 6) in the corners of the prism. Something you know you could then peel off when you had to change the prism, but I would imagine it would be next to impossible to even get the glue to stick!! Tough one, I'm really not sure. Good luck and let us know what solution you come up with, Chris..
How about using cheaper uncoated lenses for this project?
A few drops of water, put on prism and squeeze the water to the sides out of the way. You have then created a vacuum that will hold the press on prism very tight.
Chris, have you actually done that on a premium A/R coated lens?Originally Posted by Chris Ryser
I for one have not tried it and would love to know if it was a success, Chris..
I think the best thing is not to use a premium AR that is slippery.
I thought the point was the prism wouldn't stick to the A/R with water because of the oleophobic nature of the new coatings.
Use Alcohol to clean and dry the lens. Start in the center after having cut the fresnel paster to slightly small than exact shape. Make sure everything is spotlessly clean including your hands. Squeege lens from center with fingers, it'll stick.
Today I noticed instructions on outside of a fresnel paster, it actually showed it being placed on anterior surface. I have always applied these to the posterior, but I suppose it could be done on the front if no raised bifocal were involved. The flatter the surface you apply this to the easier it will be to apply. So if no raised surfaces are involved try the flattest of the two surfaces (anterior on minus, posterior on plus).
Hope this helps,
Chip
Chip
Big BS .......................
The word oleophobic is one big BS........and brainwash..............these NOT so new coatings.........have been on the market since 1987 when I developed and sold the first one.
They provide a total seal of the surface which otherwise would be a microscopically rough surface. Water, grease, dirt, ect. As they are made from a silicone base they are very slippery and smooth.
:finger:
Optiman:
Have you even tried this or are you afraid to take an fresnel out of the box. The Fresnel sticks somewhat like a suction cup, therefor the smoother the surface the better it should work..
If you try to put it on before trimming you should be able to tell if it works, if not it can be put back in it's little box at no expense or damage..
If it does stick, then trim and mount as instructed.
Chip
We used to occasionally use a light spirtz of hairspray to get our blocks to stick if someone cleaned off the "outer" layers of the Alize coating. The hairspray was essentially the same thing as that outer layer of Alize, looks purple, cleans off after glazing.
If you used the hairspray, I'm not sure if it would affect the vision with the patch right over it. It's a thought, though and it might keep the patch on much tighter. When you want to remove said hairspray, use alcohol or Acetone Replacement.
Good luck!
Thanks for the suggestions....gonna try with the next set. --J
If you find something that works well, please do come back and share!
I agree. What is the purpose of AR coating on a lens that will have a temp prism on it?
~The Mighty Mutt
There are currently 1 users browsing this thread. (0 members and 1 guests)
Posting Permissions
Reply With Quote
Bookmarks