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.
What Causes Eye Flickering: Eye flickering or eye twitching is quite common among people. 1  Usually, the bottom eye lid is the one that is involved in twitching, but quite often the top eye lid may also begin to twitch. 2  This flickering or twitching can be very annoying.