Disclosed is an ophthalmologic apparatus which is provided with a display processing section (13), a touch panel (14), and an image display state switch section (11). In the display processing section (13), the display mode can be switched between a reduced image display mode and an enlarged image display mode, and between a measured image display mode and a processed image display mode. The touch panel (14) is superimposed on a display (13a) of the display processing section (13) and detects the presence or absence of contact, outputting coordinate data corresponding to a contact position. The coordinate data from a contact start position to a contact release position is inputted to the image display state switch section (11), which determines on the basis of the coordinate data the sliding direction of a contact point and a selected image on the display (13a), thereby determining whether to switch the display between the reduced image display mode and the enlarged image display mode or switch between the measured image display mode and the processed image display mode, and switches the display of the selected image.
