公开(公告)号：JPH02295535A

公开(公告)日：1990-12-06

申请号：JP10993590

申请日：1990-04-25

Applicant: ESSILOR INT

Inventor： JIYAN KUROODO ANNEKAN ,  KURISUCHIYAN MAZAARU

IPC: A61B3/11 ,  G02C13/00

Abstract: PURPOSE: To measure a pupil interval by compositing the main axis to be vertical to a near-plane of human face and this plane with reference to a human posture whose head is straight held up and whose line of sight is focused to the horizontal line. CONSTITUTION: Upon having the forehead holder 1a and nose pad 1b touching to each given point of the face of a patient 1 to be checked, respectively, a front panel 2a is positioned in almost parallel with patient 1 face, whose window hole's 2b position is fitted to the position of optometric lens framed. The focus of the constringent-type lens 4 agrees with a point light source 7. The virtual image produced by the lens 4 and reflected back from the cornea is treated as a real image by an objective lens 5, to which the real image in the plane vertical to a main axis 3 is corresponded and where a measuring scale 6 placed transversally in the plane exists as well. This measuring scale 6 is also provided with a computer system, including charge-transfer elements accompanying an array of sensitive members, so that a controller/reader unit 8 successively scans the contents to indicate pupil intervals.