| CPC G02B 27/0176 (2013.01) | 19 Claims |

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1. A head-mountable device, comprising:
a display portion including a display;
a facial interface defining a fluid chamber comprising:
a first pneumatic chamber extending around the display portion; and
a second pneumatic chamber extending around the first pneumatic chamber;
the fluid chamber being actuatable based on sensor data;
a sensor disposed on or within the facial interface, the sensor configured to generate the sensor data; and
a securement assembly connectable to the display portion, the securement assembly comprising:
a removable strap comprising electronics; and
a retention band connectable to the removable strap.
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