Fig. 2.

(a) Leica M400E surgical microscope with OCT accessory attachment and ENT examination chair. (b) Close-up showing the OCT accessory mounted to the bottom side of the microscope. (c) Bottom view of OCT accessory. The bottom cover is threaded to match the sterile drapes (SD) commonly used to cover the microscope when used in surgery. (d) Close-up of ENT chair head rest showing the bite bar on the left used for high-phase sensitivity measurements. The speculum fixture is on the right. Both are attached to the chair with lockable articulating arms. (e) Close-up of speculum fixture showing the two earbuds used for introducing sound to the ear canal, the microphone for recording the stimulus sound, and a disposable speculum. (f) Mobile tower, housing the CPU, monitor, all electronics, laser system, and detector.