HI Laskew, Glad you found the PDSA forum! there is a lot of good information here.
There are better treatments than prednisone but most everyone begins with pred. What is your dose of prednisone? How long have you been on it? You will need to carefully taper off of it- don't quit without tapering because your body is likely dependent on it. When did you get Rituxin? Did it do anything?
I like the drugs called TPOs. They were especially designed for ITP. they are Promacta, its a daily pill. And Nplate is an injection thats given weekly in the doctor's office. But possibly you have counts that are high enough that you don't have to take anything, just monitor them? I don't know but some people can just "watch and wait" after they've had a splenectomy. You would have to see what your counts do when you taper off of prednisone.
For your eyes, I would get checked out by an ophthalmologist. An ophthalmologist will be able to tell you if you have glaucoma or cataracts from the prednisone. And if its something else, they would be able to tell you what it is. good luck!