Healthy eyes are moving together, meaning, both eyes look at the same object at the same time. This is achieved when the brain is sending “commands” through the nerves to the muscle attached to the outside of the eyeball. Squint (strabismus) occurs when there is no coordination: one eye looks at what you want to observe, and the other eye looks somewhere else.
Most types of this disorder occur in infancy or in early childhood. They are not related to any illness, but the squints that develops after childhood – what we are talking about here – almost always occurs due to a disorder in the other part of the body. Such disorders include diabetes mellitus, high blood pressure, inflammation of the arteries, brain injury, and myasthenia gravis.
The disorder affects the nerves linking the brain with the ocular muscles or (less often) the muscles themselves and, in most cases, a double image appears. Other symptoms, such as headaches, are possible due to the underlying disorder.
What to do?
Contact your doctor as soon as you begin to see a double image. To temporarily prevent a double image, cover oen eye. In order to discover the root cause of squint, your doctor will probably measure your blood pressure, examine your urine and blood, and refer you to a special X-ray.
In most cases, squint gradually disappears after several months due to good response to the treatment of the underlying disorder. If a certain level of squint is still present, it can be corrected by glasses with prismatic glasses (if the squint is weak) or with the ocular muscles operation (if the squint is pronounced).