Hi. I'm online and happy to answer your question today.
I would contact Merck and alcon
Here is contact info for merck:
here is the contact info for alcon:
And, now, the obligatory word from our sponsors: :o)
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I see that you are offline. I'll switch over to the Q&A system. This system works a lot like 'text messaging' but an email is sent to each of us anytime something is posted to this thread. We can continue to work on your question there..... :)