A method of operating an eye surgery system comprises operating actuators of a stand such that an apparatus for measuring the refraction of an eye is located in a measurement position relative to the eye measuring at least one condition of the eye and determining at least one condition value representing the at least one measured condition of the eye measuring the refraction of the eye and determining at least one refraction value presenting the measured refraction of the eye, wherein a time distance between the measuring of the condition of the eye and the measuring of the refraction of the eye is smaller than a predetermined duration and outputting the at least one refraction value representing the measured refraction of the eye only when the condition value representing the measured condition of the eye is within a predetermined range of values.
