| 摘要 |
A non-contact type tonometer in which an air is sprayed on an eye to be examined to deform the cornea and measure the intraocular pressure of the eye to be examined. The tonometer is provided with a cylinder, a piston for compressing the air in the cylinder, a deformation detection system for detecting deformation of the cornea sprayed with the air, and a driving system for driving the piston and having a piston driving spring and a spring operation mechanism. When a measurement is performed, the force is accumulated in the spring, then released by the mechanism.
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