The Hess-Lancaster screen test is a non-invasive test used to study eye movements, comparing the position of one eye with respect to the other in different gaze positions. It allows to identify which eye muscles present some alteration of mobility and therefore are responsible for the patient’s diplopia or double vision.
“Adult strabismus” is considered to be those cases of strabismus (the eye axes are not aligned with the object of fixation) that arise from the age of 6-8 years.
Diplopia is a visual alteration consisting in the perception of double vision. This vision disturbance can be horizontal, vertical or oblique depending on how the images appear.
We speak of childhood strabismus when a child suffers an alteration in the alignment of the eyes that causes them not to look simultaneously at the same point. Strabismus can occur in adults too.
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