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)
An eye focusing problem that is unrelated to changes in the lens of the eye due to aging. Amblyopia. Also known as lazy eye, the loss or lack of development of clear vision in just one eye not due to eye health problems. Eyeglasses or contact lenses can't fully correct the reduced vision caused by lazy eye.