Seeing Double

When our eyes focus on something 5 meters away, objects that are 1 meter away tend to appear as two separate objects.

Say that you're focusing on an object 5 meters in front of you and you're holding up your right pointer finger 1 meter away from your face, almost in line with the object you're focused on. You then extend your left hand 0.5 meters directly infront of you so that it does not yet interfere with your view of your finger. You then slowly move your left hand between your right pointer finger and your left eye. Which image of your right finger will disappear first?

Challenge: Do this without acting it out.

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