This May Be Why One Eye Is Weaker Than The Other

Frequently you will hear people talk about one eye that is weaker than the other. When they compare both eyes, they will remark that one eye, either their left or their right, always appears sharper. What the people are noticing, however is a normal phenomenon.

There are certain real medical reasons why one eye can be weaker than the other. And it could be that the glasses prescription is just wrong. I won’t get into those causes in this post. But there are reasons why a very normal healthy eye just doesn’t “see” quite as well as the other. This phenomenon is due to eye dominance.

Here is a fun test. I want you to look at a small object with both eyes open on the far side of the room. Put both hands in front of you forming a small triangle and look at that object. Keep the object in the center of the triangle as you bring the triangle slowly towards your nose. You will find that the triangle starts to center over one eye. This eye is your dominant eye!

Vision develops to use both eyes together. In most people, however, one eye ends up getting more sway in the brain in the other. This is the dominant eye. It’s similar to how you have a hand which is dominant over the other (but being right-handed doesn’t mean you will be right eye dominant). It’s a brain thing and there is really nothing to do about it. Nor is there a need since when both eyes are open you just simply don’t notice. It’s quietly performing it’s supporting role to your dominant eye to provide you with fantastic vision!

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