It depends on the cause. The most common cause of blurry vision is a refractive error that causes near-sightedness or far-sightedness. When this happens in one only eye, glasses can be made with one corrective lens and one non-corrective lens. You can also wear a contact lens to correct the blurry eye.  Other causes of single-eye blurriness may require medication, laser eye surgery, or other therapies. If you experience blurriness in one or both eyes, see your eye doctor.