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.
In some children lazy eye is caused by a combination of strabismus and refractive problems. Deprivation. Any problem with one eye â such as a cloudy area in the lens (cataract) â can deprive a child of clear vision in that eye. Deprivation amblyopia in infancy requires urgent treatment to prevent permanent vision loss.
7 Causes for Eye Twitching. Fatigue. Another reason for twitching eyes may be a lack of sleep or fatigue resulting from it. Fatigue resulting from physical exertion or inadequate sleep can both cause the eye to twitch. Just as fatigue has the potential to affect other muscles in the body, it can do the same to muscles of the eyelid as well.