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.
Though a lot of people think that twitching eyes are caused by stress or fatigue, the real hidden cause is dry eyes. When eyes are too dry, you involuntarily start blinking to keep them moisturized. After a while, the blinking triggers your nerves and tricks the brain into making your eyes twitch even more.