corvis st 2014测量眼压角膜变形新型仪器.pdf

A New Instrument for Measuring IOP and Corneal Deformation The OCULUS Corvis ST Corneal Visualization Scheimpflug Technology What Influences Deformation? Intraocular Pressure! Corneal Biomechanical Properties Corneal Thickness Corneal Curvature Why are Corneal Biomechanics Important? Examples for applications • Accurate measurement of IOP • Identify risk factors for a • Medical treatment for a • Identify patients at risk for e ia • Measuring the effect of corneal crosslinking • Improved prediction of refractive es • Etc. Case Report 1: Pressure Induced Stromal Keratopathy Data provided by Cynthia Roberts and Renato Ambrosio Pressure-induced Stromal Keratopathy • BCVA 20/100 OD; 20/20 OS • Slit-lamp biomicroscopy OD – Layer of corneal opacity underneath the flap • GAT 12mmHg OU • Oral acetazolamide 250 mg TID, topical fixed combination of dorzolamide and timolol maleate BID, and to decrease topical prednisolone in a fast tapering regimen. Scheimpflug Imaging OD • High-resolution Scheimpflug images identified a hyperreflective zone without a fluid-filled space under the flap Corvis® ST Assessment CorVis IOP GAT=12mmHg Case Report 2: Case of Asymmetric a Data provided by Dr. Cynthia Roberts Case Report 2: Asymmetric a • GAT OD 11mmHg • GAT OS 11mmHg • DCT OD 16.0 mmHg • DCT OS 17.5 mmHg • CorVis…………? Data provided by Dr. Cynthia Roberts What does the Corvis