Convergence issues

I have two types of convergence issues - both only present with my current RX and older RX glasses.

  1. When there is a dark background with a light foreground the lighter object tends to move as a move my head.

  2. Same thing happens, but with blue LEDs. If I move my head the blue LED seems to move along with it. Green LEDs exhibit the same issues but far less.

Has anyone else had any of these issues?