I have had injections of Lucentis which is a similar medication. I was told in the beginning that I would need four injection. These turned into many more injections without any explanation why. I finally dumped this eye doctor because I felt he had deceived me from the beginning. The injections did work for me, it was the deception that got my goat.
I wrote about my experience after my first injection, Below is a link to what I wrote, I hope it helps