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.
A twitching eye can be one sign of stress, especially when it is related to vision problems such as eye strain (see below). Reducing the cause of the stress can help make the twitching stop. Tiredness: A lack of sleep, whether because of stress or some other reason, can trigger a twitching eyelid. Catching up on your sleep can help.