Crossed eyes are also called strabismus which deals with the eye muscles, the nerves that send signals to the muscles, or the control center in the brain which directs eye movements. An imbalance of the eye and facial muscles, shown as low muscle tone, cerebral palsy, stroke and Guillan-Barre syndrome, may all affect the muscles that direct the coordination of a person's eyes. Maligant tumors that occur near the eyes can contribute to the lack of coordination that results in strabismus. Besides, if a person's parents or siblings have strabismus, there is more possibility for him or her to get the illness. By the way, structural abnormalities in the eyes can lead to crossed eyes. Retinopathy, known as scarring damage of the retina may cause such impairment.
