Parents find that many children have “opposite eyes” and request treatment, but doctors rule out strabismus after examination. The doctor ruled out strabismus after examining the child, saying that the child had a strabismus in appearance, but in reality there was no strabismus and the eye position was normal. However, the parents refused to believe it because they saw that their child had a clear strabismus. This condition is most likely to be mistaken for an internal strabismus, and is the most common type of pseudostrabismus. The reason for this is that the inner canthus covers the inner canthus of the eye, and in severe cases, it can cover part of the sclera, so that the sclera on the nasal side is less exposed than on the temporal side, which, together with the wide nasal root of the infant, gives the impression of internal strabismus (opposite eye) from the outside. When the child’s eye is turned to the left or right, the inwardly turned eye appears more pronounced. The way to identify this is to pinch up the skin at the root of the child’s nose to expose more of the sclera on the side of the nose, and the “internal strabismus” will disappear. In addition, we can also use the method of corneal reflection, that is, shine a flashlight between the two eyes of the child and observe whether the light shadow is in the middle of the cornea; or check the eye position by alternately covering one eye to identify. In fact, if there is no strabismus and the eye position is normal, it is pseudostrabismus and does not require treatment.