COMMUNICATING with yours eyes is not just for humans. Cats too use contact to show their feelings. However, there are some differences between cat and human language which you must be aware of if you want to communicate.
That's why in a room full of people, the cat will often head straight for the person who doesn't like cats. It's because people who like cats will be looking at him while those who don't will be looking away, hoping he will leave them alone. So, ironically, the cat lovers are perceived as being threatening, while the cat haters look like they pose no threat.
You can "kiss" your cat by looking him in the eye and then slowly blinking. You are, in effect, telling your cat: "I'm no threat to you. I love you." The first time you do this, he might not respond but soon he'll blink at you in return. The first time this happened to me, I felt a real sense of connection, like I was really "talking" to my cat.