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)
Strabismus (crossed eyes) is the most common cause of amblyopia. There is often a family history of this condition. The term lazy eye refers to amblyopia, which often occurs along with strabismus. However, amblyopia can occur without strabismus. Also, people can have strabismus without amblyopia.