Just as you can be right-handed or left-handed, you can be right- or left-eared and eyed. We not only favor one side, but it also works better. (Even those of us who are ambidextrous usually still favor one side.)
Gauging your earliness
When you talk on the phone, do you tend to hold it mostly to one ear? How about if you’re eavesdropping – do you press that same ear to the door?
According to KIND (cited below), a research study in 1998 at the University of Dresden used data from 300 students after asking subjects to “listen for a stopwatch on the table or a soft voice, listen at a door and make a phone call.”
62% of people were right-eared (and 84% of the total were left-handed). That means your dominant ear could be the opposite of what you might expect.
21% of the study subjects were left-eared while 17% showed no preference. So there’s a decent change you don’t have a dominant ear. However, if you hold a telephone up to your ear, you may be likely to have a preferential ear and it’s likely to be on the same side as your dominant hand (which you would typically use to hold a phone).
Laterality
A preference for a certain side of the body is known as laterality. And it can refer to eyes and even legs.
Next time you step off a curb (or even begin your stride) or move one eye closer to something you’re trying to read, pay attention to what side of your body it’s on. It may tell you something interesting (although not terrible insightful about your personality).
It may even be able to tell you something about your health. For example, studies have shown that some eye diseases are more likely to occur in the dominant eye. — WTF fun facts