Editing Strabismus (section)

=== Laterality ===

Strabismus may be classified as unilateral if the one eye consistently deviates, or alternating if either of the eyes can be seen to deviate. Alternation of the strabismus may occur spontaneously, with or without subjective awareness of the alternation. Alternation may also be triggered by various tests during an eye exam.<ref name=meei>{{cite book |first1=Neil J. |last1=Friedman |first2=Peter K. |last2=Kaiser |first3=Roberto |last3=Pineda |title = The Massachusetts Eye and Ear Infirmary illustrated manual of ophthalmology |year = 2009 |publisher = Saunders/Elsevier |isbn = 978-1-4377-0908-7 |edition = 3rd }}</ref>{{Page needed|date=May 2017}} Unilateral strabismus has been observed to result from a severe or traumatic injury to the affected eye.<ref name="Rosenbaum et al." />