It's Always Sunny in Philadelphia Wiki

An ocular patdown is a visual threat assessment performed by Mac or his cousin, Country Mac. Charlie once performed an ocular pat down on Cricket in Pop-pop: the Final Solution. 



Mac: I did an ocular patdown on him.
Dennis: What?
Mac: I'm saying I did an ocular assessment of the situation, garnered that he was not a security risk and I cleared him for passage.
Season Five: The Gang Hits the Road

Mac: (puts on sunglasses) Perfect for ocular patdowns.
Season Eight: Pop-Pop: The Final Solution

Country Mac: I gave him an ocular patdown, assessed the threat level, clocked a knife in his boot.
Season Nine: Mac Day