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Hi Gary,

We have used ultrasound gel (which is probably repackaged KY, now that I think about it) but most often we use Genteal eye gel, 0.3% Hypromellose. For overnights we use a cut-off glove finger to stabilize larger amounts of the stuff around the top of the objective. It's still water-based, so it dries up after several hours if you use too little.

http://ecatalog.alcon.com/PI/GenTealSevere_us_en.pdf

Hope this helps,

Theresa

On Nov 19, 2013, at 5:08 PM, "Laevsky, Gary S." <[log in to unmask]> wrote:
> 
> Years ago we used something like Soave hair gel, or something similar, to maintain a tall meniscus for long periods of time (the index was very close to water).  It was also safe for the coatings, or so we thought at the time.
> 
> The oils with indices  close to water that are available now are not nearly viscous enough.
> 
> Does anybody know of any options?
> 

------------------------------------
Theresa C. Swayne, Ph.D.
Manager, Confocal and Specialized Microscopy Shared Resource
Herbert Irving Comprehensive Cancer Center, Columbia University
1130 Saint Nicholas Ave, 222A
New York, NY 10032

212-851-4613

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http://hiccc.columbia.edu/research/sharedresources/confocal