Dynamic tonometry device and method for controlling coaxiality of probe with eyeball

A dynamic tonometry device, comprising a probe, a housing, a sleeve, a light source, an image sensor, a pressure sensor, a microprocessor, a display storage and a power source, the probe taking a form of a truncated cone with small at left and large at right and being made of transparent optical materials;

• an inner hole of the sleeve being in the same form as the probe;
• the sleeve being slidably fitted on the probe;
• an end face of a small end of the probe being situated to a left of a left end face of the sleeve;
• a right end of the sleeve being fixedly connected with a left end of the housing;
• on a large end of the probe being installed the pressure sensor;
• a sensing end of the pressure sensor being pressed against a left end face of the housing;
• inside the housing being installed the light source, the image sensor and a convex lens;
• light emitted by the light source being collimated through the convex lens into a parallel light beam, and then the light beam being vertically incident to the large end of the probe;
• after performing total reflection inside the probe, the light beam entering into the image sensor;
• inside the housing being installed the microprocessor, the display storage and the power source;
• with the power source being connected the microprocessor, the display storage, the pressure sensor, the image sensor and the light source;
• with the microprocessor being connected the pressure sensor, the image sensor and the display storage.