instillation is accomplished by providing a reservoir containing a therapeutic medium to which is fluidly coupled a cannula and inserting a portion of the cannula sub retinally whereby the therapeutic medium within the reservoir is coupled to and dispersed subretinally via the cannula application_number US 54308304 A description referring now to the various figures of the drawing wherein like reference characters refer to like parts there is shown in fig1 a a simplified block diagram or schematic view of a therapeutic medium delivery device 10 according to the present invention as shown in fig1 a the therapeutic medium delivery device 10 includes a main body 20 and a outlet member or cannula 30 that is fluidly coupled to the interior volume 22 or compartment of the main body the cannula 30 also is arranged so as to extend outwardly from the main body and from any one of the bottom side or top surfaces of the main body the main body 20 more specifically the main body interior volume is sized so as to contain a desired amount of the therapeutic medium to be dispensed or instilled subretinally in the eye 2 in the case where the therapeutic delivery device 10 is disposed within the eye 2 the.