The main sign of strabismus is an eye that is not straight in comparison with the other eye. Sometimes children will squint one eye in bright sunlight or tilt their head to use their eyes together which may reveal other binocular vision disorders.
The eyes of infants may also appear to be crossed, although they are not. This condition is called pseudostrabismus. Young children often have a wide, flat nose and a fold of skin at the inner eyelid that can make eyes appear crossed. This appearance of pseudostrabismus may improve as the child grows and seem to disappear when older. A child will not outgrow a real strabismus.
An ophthalmologist can distinguish true strabismus and pseudostrabismus.