PROBLEM TO BE SOLVED: To correctly measure the curvature of an eye to be inspected from a tomographic image captured by an OCT apparatus.SOLUTION: This image capturing method for obtaining a tomographic image from multiplexed light formed by multiplexing return light obtained by irradiating an eye to be inspected with measuring light to reference light includes: a first step of measuring the distance between the eye to be inspected and an objective lens a second step of acquiring a tomographic image of the eye to be inspected a third step of setting an area where the curvature of the tomographic image is computed and a fourth step of computing the curvature of the area set using the measured distance.