these are probably entoptic phenomenona. the 'seeing your own blood vessels' is probably a form of the 'troxler effect'. you may also be seeing 'scheerer's
phenomenonRaynaud's phenomenon
Raynaud’s phenomenon':
http://en.wikipedia.org/wiki/Blue_field_entoptic_phenomenon
as for the 'pulsing', it is probably not dangerous IMO, although it could be caused by high or low BLOOD
PRESSUREPressure ulcer, so if you havent had a physical and an eye examination, you probably need both.
the twitching
eyelidEyelid bump
Eyelid lift
Eyelid twitch is called 'myokymia' and is absolutely benign. its usually exacerbated by lack of sleep, stress, and stimulant use like caffeine.
Lee