Realvision is a type of virtual reality-like simulation.
Marvel Comics continuity
At Club Con, Ratbat used the captive Buster Witwicky as a successful test subject for the Realvision technology. Subsequently, Ratbat used Realvision to enable himself and Starscream to relive a pivotal moment in ancient Cybertronian history: Optimus Prime's decision to launch the Underbase into space rather than let it fall into Decepticon hands. Unbeknownst to Ratbat and Starscream, Buster managed to sneak into the Realvision simulation and spy on the proceedings.