PROBLEM TO BE SOLVED: To measure the shape of each surface of an object (eye) even if the object (eye) moves or rotates. SOLUTION: The depth direction can be measured almost instantaneously by OCT measurement, and the cornea shape can be accurately measured by video keratometry or the like. Since the cornea shape at the incident position of the irradiation light on the object (eye) is also known, the direction vector after refraction by the front surface of the cornea of the measurement beam can be obtained by Snell's law. Therefore, from the interference information of each beam, the positional information of the boundary of the inner surface of the eye such as Bowman's membrane, the front and rear surfaces of the cornea, the front and rear surfaces of the crystalline lens, and the retina can be obtained. By obtaining a plurality of or a large amount of boundary position information, the surface shape of this boundary can be obtained. [Selection diagram] FIG.【課題】 対象物（眼）が動いたり回転しても対象物（眼）の各面の形状を測定できるようにすること。【解決手段】 ＯＣＴ測定により深度方向はほぼ一瞬で測定でき、角膜形状は、ビデオケラトメトリ等で正確に測定できる。照射光の対象物（眼）への入射位置での角膜形状も分かっているので、測定ビームの角膜前面による屈折後の方向ベクトルがスネルの法則により得られる。よって、各ビームの干渉情報から、ボーマン膜、角膜前面・後面、水晶体前面・後面、網膜等の眼の内部の面の境界の位置情報が得られる。境界の位置情報を複数又は大量に得ることで、この境界の面形状が得られる。【選択図】図４
