Eye contact may communicate very different things to people of various cultures. What will you be "saying" by your nonverbal communication when you make eye contact in different cultures?
Certainly, there are many non-verbal cues that have completely different meanings in different cultures. One of the most important means of nonverbal communication in any culture is eye contact—or lack thereof. Eye contact—which simply denotes one person looking directly at another person’s eyes—seems to have strong implications in almost every culture, although what these implications are vary extensively across the globe!
Eye Contact in the United States
What does eye contact mean in the United States? Here, if you have good eye contact with a person, it generally signifies that you are interested in the person you are looking at and in what that person is saying. If you look down or away from a person rather than meeting his or her gaze, you are considered to be distracted or uninterested in him or her. Also, if you neglect to make eye contact with a person, you may be thought to lack self-confidence.
On the other hand, a person who makes eye contact with another person is thought to be confident and bold (and boldness is considered a good trait!) So, in summary, making eye contact is generally considered a good thing in the United States.
Eye Contact in Western Europe
On the one hand, the European customs of eye contact—especially in such countries as Spain, France and Germany—tends to be 
similar to that in the United States. It is considered proper and polite to maintain almost constant eye contact with another person during a business exchange or a conversation.
Yet eye contact also has more flirtatious aspects than it does in the U.S. In the U.S., people often avoid eye contact in crowded impersonal public situations—such as while walking through a busy downtown or riding public transportation. In a country like France, however, a stranger may feel quite free to look at someone he is interested in and try to acknowledge his interest by making eye contact. Therefore, it is important for a visitor to understand the full implications of what he or she may be implying by returning the eye contact initiated by someone else.