1. Ophthalmological method for measuring a cornea, comprising: projecting the two-dimensional reference pattern onto the cornea; acquiring a reflection pattern reflected by the cornea by virtue of the reference pattern; storing a plurality of different reflection images of one or more reflection patterns reflected by the cornea by virtue of the phase-shifted reference patterns; measuring intensities in the plurality of different reflection images at a pixel corresponding to a point on the cornea; calculating for the point on the cornea a phase value of the reflection pattern on the basis of the intensities measured in the plurality of different reflection images by evaluating the equation 
 I ( x′,y ′)= I 0 ( x′,y ′){ 1 + m ( x′,y ′) cos[φ( x′,y ′)]}, I(x′,y′) being a measured intensity at the corresponding pixel with coordinates x′,y′, I 0 (x′,y′) being a background intensity at the pixel, m(x′,y′) being a signal modulation at the pixel, and φ(x′,y′) being the phase value at the relevant point, and determining at least one measured geometerical value of the cornea on the basis of the phase value. determining at least one measured geometrical value of the cornea on the basis of the phase value.