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.
However, if your teeth are not straight, then you have a malocclusion, which is medically justified to treat with orthodontics (Invisalign is Orthodontics). A vast majority of the population has some sort of malocclusion -â¦ SHOW MORE. FSA typically covers anything medically necessary and not cosmetic or elective.