Patent attributes
An apparatus that includes an intraocular pressure measurement part having a blowing unit, an optical characteristics measurement part, a main body having the above measurement parts, a measurement part shifting unit bringing one of the measurement parts to a measurable state, a working distance detecting unit having a projection optical system and a photo-receiving optical system, a control part judging whether to continue shifting the intraocular pressure measurement part to the measurable state based on a detection result and controlling the shifting unit based on a judgment result, and a detection unit directly or indirectly detecting whether light photo-received on the photo-receiving optical system is target light reflected from a cornea, wherein when the light is not the target light, the control part judges it proper to continue shifting and controls the shifting unit.
