Robocop 2 (1990)

Continuity mistake: When the mayor turns up at the steelworks to speak to the boy about getting money, the limo has square headlights and white-walled tires. Cut to a few scenes later when Robocop 2 has already turned the limo over, the headlights are now circular and the tires are all black.

Lewis: Good eyes, Murphy.
RoboCop: Good as money can buy.

Trivia: When Robocop picks up Duffy the dirty cop and throws him into the arcade machine, when Robocop then pulls him away from the screen, you can see that the game playing on the arcade is none other than Robocop.

Question: If the creation of Robocop 2 called for a brain, then how come when they removed Kane's' brain from his skull did they also take the eyes?