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.
Stay ahead of the game by asking for written authorization at the beginning of the year for any FSA-eligible expenses that require a doctorâs permission for reimbursement. And, as of January 1, 2011, a doctorâs prescription is required for over-the-counter (OTC) medications, such as Claritin and Tylenol.