3-D movies and the effects on vision

Lens and Iris were watching trailers for upcoming movies. When the food advertisements started, Iris asked Lens, ”Could you go get us some popcorn?” Lens replied, “Don’t have to; this is a 3-D movie, and the food’ll come floating by any moment.”

Have you experienced troubles watching the new 3-D movies at the theatre? Do they make you feel eye strain, double or blurred vision? It’s often due to problems using both eyes together in a coordinated manner.

For instance, a need for correction change, especially if one eye needs more change than the other, can hinder the brain’s ability to focus and...