An ophthalmologic apparatus, comprising: an OCT measurement unit (8, 320) including an optical scanner and configured to acquire data of a subject's eye by splitting light from a light source into measurement light and reference light, deflecting the measurement light using the optical scanner to project onto the subject's eye, and detecting interference light between returning light of the measurement light from the subject's eye and the reference light; a corneal shape measurement unit (3, 310) configured to project a measurement pattern onto a cornea (Cr) of the subject's eye, to detect returning light of the measurement pattern, and to obtain curvature radius distribution on the cornea (Cr) based on an image formed by the detected returning light; an eyeball model generator configured to generate an eyeball model using the curvature radius distribution on the cornea (Cr); an eye refractometry unit configured to project light onto the subject's eye, detect returning light of the light, and to obtain an eye refractive power of the subject's eye based on an image of the detected returning light; and an intraocular distance calculator configured to obtain an axial length of the subject's eye based on the data acquired by the OCT measurement unit (8, 320); a site specifying unit configured to specify a traveling direction of the measurement light by performing ray tracing on the measurement light incident on each of a plurality of incident positions on the cornea (Cr) based on a scan angle (θ) by the optical scanner and the eyeball model, and to specify a position corresponding to an intraocular site of the subject's eye in the traveling direction based on the data acquired using the measurement light, and to specify shape of the intraocular site based on standard value data representing optical characteristics of an eye, the eye refractive power, and the axial length; wherein the site specifying unit configured to generate size information based on the standard value data, the eye refractive power, and the axial length, and the site specifying unit configured to specify the shape of substantially real size of the intraocular site by converting a distance between the specified positions into a distance corresponding to the actual size based on the size information. an OCT measurement unit (8, 320) including an optical scanner and configured to acquire data of a subject's eye by splitting light from a light source into measurement light and reference light, deflecting the measurement light using the optical scanner to project onto the subject's eye, and detecting interference light between returning light of the measurement light from the subject's eye and the reference light; a corneal shape measurement unit (3, 310) configured to project a measurement pattern onto a cornea (Cr) of the subject's eye, to detect returning light of the measurement pattern, and to obtain curvature radius distribution on the cornea (Cr) based on an image formed by the detected returning light; an eyeball model generator configured to generate an eyeball model using the curvature radius distribution on the cornea (Cr); an eye refractometry unit configured to project light onto the subject's eye, detect returning light of the light, and to obtain an eye refractive power of the subject's eye based on an image of the detected returning light; and an intraocular distance calculator configured to obtain an axial length of the subject's eye based on the data acquired by the OCT measurement unit (8, 320); a site specifying unit configured to specify a traveling direction of the measurement light by performing ray tracing on the measurement light incident on each of a plurality of incident positions on the cornea (Cr) based on a scan angle (θ) by the optical scanner and the eyeball model, and to specify a position corresponding to an intraocular site of the subject's eye in the traveling direction based on the data acquired using the measurement light, and to specify shape of the intraocular site based on standard value data representing optical characteristics of an eye, the eye refractive power, and the axial length; wherein the site specifying unit configured to generate size information based on the standard value data, the eye refractive power, and the axial length, and the site specifying unit configured to specify the shape of substantially real size of the intraocular site by converting a distance between the specified positions into a distance corresponding to the actual size based on the size information.