Hello there,
I often have twitching of my eyelids but usually when I am extremely tired, I get a lot of "floaties" in my vision and have been told that these are not an indication of anything terrible happening. I also get times when my field of vision is like looking through a broken mirror and I can not see for about 20 minutes to an hour. I was told by my neurologist these are "migraines" involving the optic nerve but they are not in themselves dangerous.
I would always advise though to never presume visual disturbances are from our CRPS as the symptoms are similar to other severe opthalmic problems such as detached retina.
I would definitely have a complete check up with an opthalmologist to reassure you even though it may not fix the problem!
Wishing you good luck
Tayla