Patent ID: 6623429
Filing Date: 2003-09-23
Classification: A61B

Abstract:
A hand-held non-contact tonometer for measuring intraocular pressure of an eye, said tonometer comprising:a housing including an elongated handle portion and a head portion connected to said handle portion; an opto-electronic tonometric measurement system residing in said head portion of said housing, said tonometric measurement system including an optical axis and a fluid discharge tube aligned on said optical axis, said fluid discharge tube having a fluid exit end; a position detection system residing in said head portion of said housing for generating signal information indicative of the XY location of said optical axis relative to a corneal vertex of said eye and the Z location of said exit end of said fluid discharge tube relative to said corneal vertex; a view path along through said head portion of said housing along said optical axis for enabling an operator to directly view said eye; and a display connected to said position detection system for guiding said operator in achieving XY alignment of said optical axis with said corneal vertex and Z alignment of said exit end of said fluid discharge tube at a predetermined distance from said corneal vertex based on said signal information.