A medical observation apparatus comprising: an imaging unit configured to acquire captured video data, the captured video data being data of a captured video obtained by capturing an image of an observation target; a supporting unit configured to support the imaging unit; a trigger operation detecting unit configured to detect a trigger operation, the trigger operation being a predetermined operation associated with an operation of the imaging unit; a surgical tool recognizing unit configured to recognize a form of a surgical tool included in the captured video based on the captured video data; and an observation visual field correcting unit configured to correct an observation visual field based on the form of the surgical tool recognized by the surgical tool recognizing unit when the trigger operation is detected by the trigger operation detecting unit, the observation visual field being a range of a displayed video displayed on a display device based on the captured video data; and an observation visual field center target determining unit configured to determine an observation visual field center target based on the form of the surgical tool recognized by the surgical tool recognizing unit, the observation visual field center target being a target to be positioned at the center of the observation visual field, wherein the observation visual field correcting unit is configured to correct the observation visual field so that the observation visual field center target determined by the observation visual field center target determining unit is positioned at substantially the center of the observation visual field; characterised in that the observation visual field center target determining unit is configured to estimate a relative position of an affected part with respect to a position of the surgical tool based on the form of the surgical tool and determines the position of the affected part as the observation visual field center target. an imaging unit configured to acquire captured video data, the captured video data being data of a captured video obtained by capturing an image of an observation target; a supporting unit configured to support the imaging unit; a trigger operation detecting unit configured to detect a trigger operation, the trigger operation being a predetermined operation associated with an operation of the imaging unit; a surgical tool recognizing unit configured to recognize a form of a surgical tool included in the captured video based on the captured video data; and an observation visual field correcting unit configured to correct an observation visual field based on the form of the surgical tool recognized by the surgical tool recognizing unit when the trigger operation is detected by the trigger operation detecting unit, the observation visual field being a range of a displayed video displayed on a display device based on the captured video data; and an observation visual field center target determining unit configured to determine an observation visual field center target based on the form of the surgical tool recognized by the surgical tool recognizing unit, the observation visual field center target being a target to be positioned at the center of the observation visual field, wherein the observation visual field correcting unit is configured to correct the observation visual field so that the observation visual field center target determined by the observation visual field center target determining unit is positioned at substantially the center of the observation visual field;