Abstract: An apparatus for monitoring an oxygen saturation level of a wearer includes a first body portion, a second body portion, and a connection member. The first body portion contains a processor, a memory operably coupled to the processor, at least one light-emitting diode, and at least one optical sensor configured to detect, during operation, a reflected portion of light emitted from the at least one light-emitting diode. The second body portion includes a grommet, and the connection member is mechanically coupled to each of the first body portion and the second body portion. The memory stores instructions to cause the processor to cause light to be emitted from the at least one light-emitting diode when the apparatus is positioned on an ear of a wearer and during operation of the apparatus, and to calculate a blood oxygen saturation level of the wearer based on the reflected portion of light.

Abstract: A head mounted display device may include a housing, including a user-facing cavity and an electronics compartment. At least one fan may be installed in the electronics compartment. A plurality of intake ports may be defined in a peripheral wall portion of the user-facing cavity, and at least one air discharge port may be defined in a wall portion of the electronics compartment. A plurality of air channels may extend between the user-facing cavity and the electronics compartment. Operation of the at least one fan may draw external air into the housing through the plurality of air intake ports into the user—facing cavity, and into the electronics compartment through the plurality of air channels, for discharge from the housing through the at least one discharge port, to provide cooling of the user-facing cavity and the electronics compartment.