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 (amblyopia) is reduced vision in one eye caused by abnormal visual development early in life. The weaker â or lazy â eye often wanders inward or outward. Amblyopia generally develops from birth up to age 7 years. It is the leading cause of decreased vision in one eye among children. Rarely, lazy eye affects both eyes.