Patent ID: 6997874
Filing Date: 2006-02-14
Classification: A61B

Abstract:
1. A noncontact ophthalmotonometer comprising: an ophthalmotonometrical optical system, which equips a nozzle for discharging fluid toward a cornea of an eye to be examined in order to deform the cornea for measuring eye pressure based on deformation of the cornea; first detecting means for detecting a position of the nozzle with respect to the eye to be examined; second detecting means for detecting a position of the nozzle with respect to the eye to be examined, driving means for driving the nozzle; and control means for controlling the first detecting means, the second detecting means, and the driving means, wherein the control means determines the position of the nozzle with respect to the eye to be examined in accordance with the detection by the first detecting means and determines a moving range of the nozzle toward the eye to be examined, wherein the control means controls the driving means so as to move the nozzle within the range of the positions of the noncontact ophthalmotonometer within which the second detecting means detects the position of the nozzle with respect to the eye to be examined, and wherein the control means controls the driving means after the movement of the nozzle within the range of the positions of the noncontact ophthalmotonometer within which the second detecting means detects the position of the nozzle with respect to the eye to be examined so as to move the nozzle toward a predetermined position based on the detected position detected by the second detecting means.