A medical inspection device which comprises a light-transmitting unit, a light-capturing unit detachably coupled to the light-transmitting unit and a hand-held display unit detachably coupled to the light-capturing unit. The light-transmitting unit comprises at least a first optical lens for receiving and transmitting light. The light-capturing unit comprises a light sensitive element and a signal output end connected to the light sensitive element, wherein the light sensitive element is configured to receive the light via the light-transmitting unit and to generate an electrical signal based on the received light. The hand-held display unit is configured to receive the electrical signal from the signal output end, wherein the hand-held display unit comprises a hand-held portion and a display portion for displaying an image based on the received electrical signal.