Applanation tonometer for measuring intraocular pressure in patients who have undergone LASIK or PRK refractive surgery, said applanation tonometer comprising an optical, transparent bi-prism having a distal apex intended to come into contact with the eye of which the intraocular pressure is to be measured. The optical bi-prism has a curved distal apex with a convex shape viewed from outside the prism, which comes into contact with the anterior surface of the cornea.
