Patent ID: 7222963
Filing Date: 2007-05-29
Classification: A61B

Abstract:
1. An ophthalmic measurement apparatus for measuring biological properties in an eye to be examined by scanning an inner portion of the eye with light, comprising: a light projection system that projects scanning irradiation light, which is irradiated from an oblique direction with respect to an eyeball optical axis of the eye from a light source into the eye; a light receiving system that receives scattered light produced by scattering of the irradiation light in the eye, which is irradiated from the light projection system; a unit that performs alignments in X- and Y-directions vertical to the eyeball optical axis of the eye using a virtual image of a first luminescent spot at an apex of cornea, which is irradiated from the eyeball optical axis of the eye; and a unit that performs alignment in a Z-direction parallel to the eyeball optical axis of the eye by capturing at a predetermined reflection angle a virtual image of a second luminescent spot at the apex of cornea, which is irradiated at a predetermined incident angle with respect to the eyeball optical axis of the eye, wherein alignments are performed using the apex of cornea as a reference by the units that perform the respective alignments to set an intersection point of optical axes of the light projection system and the light receiving system in the eye to a biological property measurement point in the eye which is shifted by a predetermined distance from the apex of cornea.