公开(公告)号：EP0673221A4

公开(公告)日：1996-01-10

申请号：EP94919449

申请日：1994-06-13

Applicant: LEICA INC

Inventor： LUCE DAVID A ,  GROLMAN BERNARD

IPC: A61B3/028 ,  A61B3/032 ,  A61B3/06 ,  A61B3/09 ,  A61B3/02

CPC classification number: A61B3/022 ,  A61B3/032 ,  A61B3/06 ,  A61B3/09

Abstract: A device for testing visual contrast sensitivity is disclosed whereby the contrast between a vectographically polarized test symbol (12, 22a) and a reference background (24) may be continuously varied by changing the direction of polarization (16') of a polarization analyzer (16) situated along the test axis (8'). The invention is practised by providing a chart projector or a conventional refractor with a rotatable analyzer (16).

公开(公告)号：EP0693899A4

公开(公告)日：1999-08-04

申请号：EP95909347

申请日：1995-01-30

Applicant: LEICA INC

Inventor： GROLMAN BERNARD

IPC: A61B3/10 ,  A61B3/16

CPC classification number: A61B3/165

Abstract: An improved tonometer (1) is disclosed having pachymetric means (44, 46, 48) for measuring a patient's corneal thickness to allow for correction of the intraocular pressure measurement where the corneal thickness measurement deviates from a calibration mean corneal thickness. In a preferred embodiment, a single light source (50) is pulsed just prior to intraocular pressure measurement to illuminate a central section, and a pair of lateral light detector arrays (34a, 34b) are arranged to obliquely image the corneal section and generate signals which may be processed by a CPU (48) to produce a corneal thickness measurement. If the corneal thickness measurement deviates from the calibration mean corneal thickness, the CPU calculates a thickness corrected intraocular pressure measurement. The intraocular pressure measurement, corneal thickness measurement, and/or corrected intraocular pressure measurement may then be reported by reporting means (64).