An ophthalmologic apparatus includes an obtaining unit configured to obtain an anterior segment image of a subjects eye, a tomographic image obtaining unit configured to obtain a tomographic image of an anterior segment of the subjects eye, a calculation unit configured to calculate a thickness of a cornea based on the tomographic image, and a display control unit configured to cause a display unit to display the anterior segment image, a closed curve on the anterior segment image, and a smallest thickness of the cornea among thicknesses of the cornea in a portion where the closed curve lies.
