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.
Limited Purpose FSA â You can generally use this account to pay for eligible dental and vision expenses. Eligible expenses may also include prescriptions, over-the-counter items and other health expenses based on your plan. You can enroll in this account, if you have a Health Savings Account (HSA).