The present invention relates to a method of calculating the total refractive power of the cornea of the eye is based on a combination of the corneal curvature or shape measurement, and the measured value obtained by the deep scan or tomographic image. In the method according to the present invention, the anterior surface of the cornea of the radius (R a ) the corneal curvature or shape, the radius of the posterior surface of the cornea (R p ) deep scan or tomographic image It is calculated from the refractive power of the cornea front (K a ), and to calculate the refractive power of the cornea after the surface (K p ) and total refractive power of the cornea (K). In particular, this case, the radius of the deep scan or posterior surface of the cornea, which is calculated from the tomographic image (R p ) directly without being put in the calculation of the total refractive power (K) as a measure, before following front / rear surface ratio, which is calculated by the additional step Te and (c) take into account. The process according to the invention is used in the calculation of the total refractive power of the cornea of the eye, and can also be applied to the eye astigmatism not only emmetropic eye.本発明は、眼の角膜の総屈折力を算定する方法に関し、角膜曲率または形状測定と、深層スキャンまたは断層画像で得られた測定値との組み合わせに基づいている。本発明による方法では、角膜前面の半径(Ra)を角膜曲率または形状的に、角膜後面の半径(Rp)を深層スキャンまたは断層画像から算定し、角膜前面の屈折力(Ka)、角膜後面の屈折力(Kp)および角膜の総屈折力(K)を算定する。特にこの場合、深層スキャンまたは断層画像から算出された角膜後面の半径(R’p)が測定値として総屈折力(K)の計算に直接には入れられず、前以て付加的なステップ内で算定された前面/後面比(c)を考慮に入れる。本発明による方法は眼の角膜の総屈折力の算定に使われ、また正視眼のみでなく乱視の眼にも適用することができる。
