Hi Grandpa
Sorry that you've got the dreaded high IOP. I'm starting to think that it's almost inevitable with a graft because a) you have to take the immunosuppressant medication because, well, you have to suppress the immune system and b) the medication has a side effect of raising the eye's pressure so unless you get taken off the stuff quickly (or are one of the lucky people who doesn't get the side effect -- but it is listed as the most common for this type of drug) it seems to have high odds of happening.
If it's the steroids we're talking about here do you know why you're still on a high-ish dose ? I know the professionals simply hate the patient looking things up on the internet and coming in saying "hey, I read in the whizzy journal of bleeding edge ophthalmology that you can do X, Y and Z so why can't you..." (I get this in my job, drives me absolutely nuts)
but (

) it may be worth asking if they can reduce your dose. I came down from 4 to 3 drops a day after about 4 months then we tried going down to one drop because my IOP was still high. It is a little bit of a gamble because you I guess have to have the graft and the pressure checked within a couple of weeks that you're not doing more harm than good, but if you can show that you're okay on a reduced dosage this should help with the IOP problem.
Second, you might have tried everything, but have you been prescribed Fluorometholone (FML) ? This, the manufacturers claim, has a lower incidence of high IOP. I'm not massively convinced, but it might be worth a try if you've not already done so.
If you're off the steroids already so they're nothing to do with the high IOP, sorry, I've no information that could help.
Hope things get sorted for you soon. Keeping everything crossed.
Best wishes
Chris