well, yes there is a possibility those 2 are related. many autoimmune diseases affect the eye and vision.
the big 2 things we worry about with steroid use as far as the eyes are concerned are:
1) steroid induced glaucoma: this would be raised intraocular
pressurePressure ulcer from the steroids. it is potentially blinding, but not related to floaters. your 'specialist' has probably already ruled this out (assuming its an optometrist or ophthalmologist).
2) cataracts: steroids can and do cause increased incidence and progression of cataracts. again, this is not something any eye doctor would miss.
so yes, steroid use of any kind can and does cause
blurredVision problems vision. but if you have already been to the eye doctor and they said your symptoms were due to 'floaters', then they have most likely already ruled out more serious conditions like glaucoma and cataracts