Quantity   Component name
1 × Endoscope camera with USB connection (approx. 8 €)
1 × Safety glasses with lenses that can be replaced - we just need the frame
1 × 15-20 cm copper wire 2.5mm2 this will just provide stability for the "camera arm"
1 × Cable ties fixing the components
1 × improved version additionally: 3mm IR LED 940nm illuminate the eye (caution, no powerful LED!)
1 × improved version additionally: resistor 150 Ohm adjust to the LED chosen
1 × improved version additionally: small piece of exposed analogue film will serve as a blocking filter for non-IR light (ambient light will not be a big problem)
1 × improved version additionally: 3D print of the housing (2 parts) ask the students to design them accordingly to the USB camera chosen
1 × improved version additionally: epoxy 2K glue glue the LED and camera board in place
1 × improved version additionally: heat shrink tubing consealing USB-cable from camera and copper wire for stability