Tokyo Kogaku Kikai Kabushiki Kaisha

Kabushiki Kaisha Topcon

Yoshitaka Torii

Kazutoshi Takagi

Hisakazu Yoshino

Kenjiro Katsuragi

Katsuhiko Kobayashi

Nobuaki Kitazima

Optical illuminating and observing apparatus

A non-contact type tonometer is disclosed. It includes a fluid discharging device for discharging a fluid from a nozzle towards an eye to be tested and transfiguring the eye, an eye pressure measuring device for measuring the eye pressure of the eye based on the pressure of the fluid, and an alignment detecting device for detecting the aligning state of the nozzle of the fluid discharging device. It further includes an eye pressure value correcting device for correcting an actually measured eye pressure value obtained by the eye pressure measuring device based on an alignment error information of the nozzle with respect to the eye using the alignment detecting device.

Noncontact type tonometer

Method for determining a refractive index of an object in which the object is illuminated with a slit pattern of illumination light to form an optical section of the section of the object and the optical section is observed in two directions to determine apparent thickness of the optical section in these directions. Operations are carried out to obtain the refractive index of the object from the apparent thickness of the optical section.

Method for determining refractive index of an object

Growing community of inventors

Tokyo, Japan

Yoshitaka Torii