The method involves observing and recording deformation of cornea of an eye by an observation system. Sectional images of the cornea are created when the cornea is deformed or not deformed. Intraocular pressure is derived from the sectional images of the cornea by an analysis device. Material characteristic of the cornea is derived from the sectional images of the cornea in the analysis device. Stiffness (S1, S2) of the cornea is derived as the material characteristic, where the intraocular pressure is derived under consideration of the material characteristic of the cornea. An independent claim is also included for an ophthalmological analysis system for measuring intraocular pressure in an eye.