Distant orbs that would acellerate upon making focus with my eyes.

I witnessed multiple yellow orbs before sunset and with clear blue sky. Upon placing my direct vision / eyesight on an orb it would pause then immediately speed up and disappear into thin air. These where in no formation and witnessed in the same part of the sky over a 15 minute duration and at far distance. In particular two these orbs moved in my direction before vanishing and myself observing what I would describe as a transparent ring following the same path.