Abstract: An eye axial length measurement apparatus includes a light source, a non-contact eye axial length measurement unit for optically measuring axial length of a patient's eye in non-contact manner, an XYZ driving unit, and a determination means which determines whether a cloudy portion which is an obstacle to measurement by the non-contact eye axial length measurement unit is present, based on one of a measurement result of the non-contact eye axial length measurement unit and an imaging result of an anterior segment section imaging unit placeable in the non-contact eye axial length measurement unit.

Abstract: An eye axial length measurement apparatus comprises: a light source which emits low coherent light; a non-contact eye axial length measurement unit for optically measuring axial length of a patient's eye in non-contact manner in such a way that low coherent light emitted from the light source is split into measuring light and reference light, the measuring light and the reference light are caused to interfere with each other, and the eye axial length is calculated based on a difference in optical path length between the measuring light and the reference light when an interference signal is generated; an ultrasonic eye axial length measurement unit including an ultrasonic probe with a transducer, the unit being placed in a position with a deviation from the non-contact eye axial length measurement unit; an XYZ driving unit including a base, a head support unit attached to the base, and a movable unit which supports the non-contact eye axial length measurement unit and ultrasonic eye axial length measurement un