Indications for surgery are failure of non-surgical treatment as well as a flexible rather than stiff arch:
*{{cite journal|last1=Vulcano|first1=Ettore|last2=Deland|first2=Jonathan T.|last3=Ellis|first3=Scott J.|title=Approach and treatment of the adult acquired flatfoot deformity|journal=Current Reviews in Musculoskeletal Medicine|volume=6|issue=4|year=2013|pages=294–303|issn=1935-973X|doi=10.1007/s12178-013-9173-z}}
*{{cite web|url=http://www.aofas.org/footcaremd/treatments/Pages/Flatfoot-Surgical-Correction.aspx|title=Flatfoot Surgical Correction|website=American Orthopaedic Foot & Ankle Society|accessdate=2018-07-04}}</ref>
</ref> In children, X-ray may be taken in more severe cases of flat feet in order to determine the extent of the deformity.<ref>{{cite web|url=https://my.clevelandclinic.org/health/diseases/14483-flatfoot-in-children/diagnosis-and-tests|title=Flatfoot in Children: Diagnosis and Tests - How is pediatric flatfoot diagnosed?|website=Cleveland Clinic|accessdate=2018-07-09}}</ref>
Report presence or absence of flat feet. To put in simpler words, an abnormally laterally rotated talonavicular coverage angle can be described as "laterally pointed navicular bone", and an abnormally decreased calcaneal pitch and abnormally downward-convex Meary's angle can be described as "fallen arch".
Upon request, severity can be given, as the value of Meary's angle or simply as "mild", "moderate" or "severe", otherwise it is not necessary to report.<ref name="indications" group="notenotes"/>
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