What Causes Eye Strain and How to Treat It

4. Visual Triggers

In some cases, the way an object looks can contribute to eye strain. A page or photograph that features two copies of the same image, stacked but slightly displaced, can strain the eyes. Printer errors are often responsible for this. The brain misinterprets the image as diplopia or double vision and attempts to correct it. Blurry images, even those with minor blurring for censorship, may cause the ciliary muscle to tighten as it attempts to focus out the blur.