A glaucoma drainage device has a housing with an open outlet end. A tube is in fluid
communication with the housing. An actuator is located in the housing. An actuation arm is
located at least partially in the housing and is coupled to the actuator. A tapered arm is
rigidly coupled to the actuation arm. A needle head is located opposite the tapered arm. A
tapered end of the tapered arm is located at least partially in the tube. When the tapered arm
is moved, it can clear an obstruction from the tube. When the needle head is moved, it can …