1 If X is a topological (or metric) space and M is a metric space, then the set of all bounded continuous functions from X to M forms a metric space if we define the metric as above: d (f, g) = sup x in X d (f (x), g (x)) for any bounded continuous functions f and g.
Invisalign is orthodontic appliance, so since orthodontic treatment is allowed as an FSA expense, Invisalign is covered. Different companies have different rules concerning amounts set aside and the timing of how funds are used for orthodontics.
expenses because services generally span more than one Plan Year. from the same FSA Plan Year in which the services were provided and the service must have been incurred. officials have informally commented that a pre-payment of orthodontia expenses is permissible in certain instances. orthodontic expenses, and instructions on completing the Orthodontia Worksheet.