This is not a high detail reply. You needed to confirm if the two medicines react together to cause "immediate pain, discomfort for several days and a deduction in vision for several weeks".....or not. (or is this implied in your response?).
I was trying to ascertain if the Systane and Carbomer can cause the symptoms described, or if there was something else put into her eyes.
Thank you for some more detail. Is there anything that can help repair or speed up the scarring?