Abstract: A head-wearable device is configured to hold at least one ultrasound transducer such that it is properly positioned for brain stimulation. Such a head-wearable device can help to ensure that the transducer makes sufficient contact with the user's head to allow for efficient ultrasound coupling. Each device may also ensure that the ultrasound transducer maintains the same orientation and position relative to the head across successive donning and doffing of the device.

Abstract: An injector includes a push rod, a magazine tube, a gate, a cannula and an actuator. The magazine tube has a lumen extending from an inlet to an outlet thereof. The magazine tube slidingly receives at least one implant therein. The gate has a closed configuration in which it covers the outlet of the magazine tube and an open configuration in which it does not cover the outlet of the magazine tube. The cannula has a distal end configured to be inserted into an eye. A lumen of the cannula is in fluid communication with the lumen of the magazine tube when the gate is in the open configuration. Actuation of the actuator moves the gate from the closed configuration to the open configuration and causes translation of the pushrod through the magazine tube and the cannula.