Ciclosporin has nothing to do with eye pressure. It is a medication to help treat your sons vernal.
There is nothing wrong with using this drop in your 6 year old child's eye, no matter what the package insert has to say...
This medication is sold as a commercially manufactured drop in the USA under the name Restasis.
Your doctor, however, may have had a more concentrated (potent) mixture of the drug custom made for your child.
I have used this exact medication in a number of patients to treat corneal issues with very good success.
Here is a very good article from a highly respected source that discusses this medication:
So. What is the take home message?
I, personally, would have no problem using this eye drop if one of my family members had Vernal keratoconjunctivitis.
It sounds like your son is getting very good care.
Does this make sense to you?
I am happy to be able to help you today. If you would be so kind, please help me get credit for my efforts in answering your questions and press the excellent feedback button for this encounter. And, don’t forget, I work for tips. I would also be happy to continue to answer any more questions you have until we have resolved your concern.
Dr. Rick MD FACS