Chronic pain: Pain (an unpleasant sense of discomfort) that persists or progresses over a long period of time. In contrast to acute pain that arises suddenly in response to a specific injury and is usually treatable, chronic pain persists over time and is often resistant to medical treatments.
Common causes of the condition include: 1  Muscle imbalance (strabismus). The most common cause of lazy eye is an imbalance in the muscles that position the eyes. 2  Difference in sharpness of vision between the eyes (refractive anisometropia).
Summary: 1  Lazy Eye is an eye condition in which there is blurry or reduced vision that is not correctable by glasses, contact lenses or eye surgery. 2  Lazy eye can cause loss of vision, including loss of depth perception and two-eyed 3D vision.