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.
Less common conditions that can cause a lazy eye include: 1  an eye disease such as a sore on the transparent layer at the front of the eye (corneal ulcer) or a scar. 2  childhood cataracts â clouding of the lens of the eye that's present from birth. 3  a droopy eyelid (ptosis)
Lazy eye is related to developmental problems in your brain. In this case, the nerve pathways in your brain that process sight donât function properly. This dysfunction occurs when your eyes donât receive equal amounts of use. A number of conditions and factors can lead you to rely on one eye more than the other.