CPU Architecture. The processor (really a short form for microprocessor and also often called the CPU or central processing unit) is the central component of the PC. This vital component is in some way responsible for every single thing the PC does.
A. Stop the tonic water! Quinine gives tonic its distinctive bitter flavor but it can cause tinnitus, especially at high doses. Hopefully the hissing sound will gradually go away once the quinine is out of your system.
There is a known muscle relaxant in tonic water called quinine (source). Many people have in fact reported drinking tonic water helped reduce or even stop their eye twitching. The simple concept is that the quinine in the tonic water helps get the fast twitch muscle fibers in your eyes to relax and stop twitching.