Position judgment device and ophthalmology equipment

The invention discloses a position judgment device, a sensing device at least comprises a first sensor and a second sensor, and the positions of the first sensor and the second sensor relative to the sensing device are not changed in the length direction of a positioning base body. The first sensor and the second sensor can identify the positioning substrate and emit a signal indicating whether the positioning substrate is identified or not. The control device judges the position of the sensing device relative to the positioning base body in the length direction of the positioning base body according to signals sent by the first sensor and signals sent by the second sensor. The sensing device or the positioning base body can move along with the equipment or the equipment part in the length direction of the positioning base body, so that the position of the equipment or the equipment part can be judged by judging the position of the sensing device relative to the positioning base body. The invention also discl