Welcome and hope we in some way can help you and also,provide you with some comfort and relief when much need it.
Many medications affected sour viewing ,specially those who causes bluer vision and obviously we forces our eyes to focus objects more than usual.medications as well can create a series of eye discomfort and also keep,in mind the brain is mostly controlling rsd I'm sure has a lots to do with the sight changes.
I will ask my optometrist to do a check up and if you already had on,mention your rsd and dr might consider to take a picture of the inside part of your eye and follow up the changes,my dr explained me ,changes often happens due to age ,little at the time ,but with neurological conditions those changes can happen more quickly than usual and also consider the meds side effects , a check up I will say might be the best option for now to create a profile and do in fact follow any possible changes .
In my case changes where noticed from one year of difference and was please by knowing that what's real and my medications formed a huge impact for that to happens, a good optometrist can made such of difference ,my gladly reacted positive to the suggestion of rechecked my twice and listened when I mentioned RSD,so try it and hope soon an explanation will finally answer that still puzzling question .
Gentle and soft hugs,with love Jesika .