Patent ID: 6602192
Filing Date: 2003-08-05
Classification: A61B

Abstract:
A noncontact type tonometer comprising:compressing means for forming compressed air; direction means for directing the compressed air to a cornea of a patient's eye; deformation detection means for detecting a flat deformation state of the cornea to which the compressed air is directed by the direction means; memory means for storing a standard pressure curvature of the compressed air that changes according to passage of time, the standard pressure curvature being inherent in the compressing means; pressure detection means for detecting a pressure changing curvature in the compressed air directed by the direction means; and processing means for determining an amended pressure changing curvature based on the pressure changing curvature detected by the pressure detection means and the standard pressure curvature stored in the memory means, wherein the processing means calculates an intraocular pressure of the patient's eye based on the amended pressure changing curvature.