When we bought our daughter a box turtle it had very swollen nasty looking eyes. Of course we were told this is normal and they also sold us eye drops.
Now just in this case alone(we let it go for about a month when I learnt it wasnt normal) we called a vet who told us to bump her hum. keep her very warm and bath her daily. After about a week with that regimine she was fine and we havent needed the drops since. I wouldnt know if its an RI or not but maybe this will help a little.