In a child with an abnormal head turn or tilt, it is important to place the head in a normal position to check for strabismus, since the child's preferred head position may hide certain forms of strabismus. There is no direct correlation between the angle of strabismus and the depth of amblyopia. In some cases of profound amblyopia, the angle of strabismus may be so small that detection is not possible using only the corneal light reflex, emphasizing the importance of accurate visual acuity testing..