Ophthalmologic apparatus

An ophthalmologic apparatus comprising:

• an objective measurement optical system that is configured to objectively measure eye characteristics of a subject eye;
• an optotype projection system that is configured to present a fixation target to the subject eye at a predetermined presentation position and apply fog to the subject eye;
• and
• a controller that is configured to control the objective measurement optical system and the optotype projection system;
• wherein the controller is further configured to preliminarily objectively measure the eye characteristics over time by changing a presentation position of the presented fixation target from the predetermined presentation position in a direction to increase an amount of fog,
• wherein the controller presumes that a tension tendency of the subject eye is prone to be tension, meaning that fogging is insufficient and the degree of relief is relatively low, so reaccommodation is likely to occur, in the event that an amount of fluctuation of the objective measurement result from the beginning of the fogging is equal to or greater than a first predetermined amount, or in the event that the sum of the amount of fluctuation in the objective measurement results each time the fixation target position is changed is equal to or greater than a second predetermined amount,
• wherein the controller presumes that the tension tendency of the subject eye is not prone to be tension, meaning that tension is sufficiently relieved and reaccommodation is not likely to occur, in the event that the amount of fluctuation of the objective measurement result from the beginning of the fogging is equal to or less than the first predetermined amount, or in the event that the sum of the amount of fluctuation in the objective measurement results each time the fixation target position is changed is equal to or less than the second predetermined amount, and
• wherein the controller is further configured to output a notification of at least one of tendency of tension of the subject eye or a state of tension of the subject eye in accordance with the preliminary objective measurement result of the eye characteristics measured over time, wherein the notification is output at an end of the preliminary objective measurement of the eye characteristics over time and before a main measurement of the eye characteristics.