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Ocular Response Analzyer® - How it Works

Ocular Response Analzyer® - How it Works
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Ocular Response Analzyer® - How it Works - 1

How it Works Although the inward and outward applanation values are derived from the same measurement process, these events respond differently to the air pulse stimulus, providing independent information about corneal properties. Human corneal tissue is a complex visco-elastic system. The CH measurement is an indication of viscous damping in the cornea. In other words, the ability of the tissue to absorb and dissipate energy. Clinical Studies have shown that the new CH measurement has applications in a wide variety of important areas including corneal disease diagnosis, refractive surgery screening, glaucoma diagnosis and management, and accurate IOP measurement. As a result, it is possible to obtain additional useful information about the eye by varying the ratio of these applanation pressure values. Using this approach, the Ocular Response Analyzer is able to determine Corneal-Compensated Intraocular Pressure (IOPCC) and Corneal Resistance Factor (CRF). IOPCC is an Intraocular Pressure measurement that is less affected by corneal properties than other methods of tonometry, such as Goldmann (GAT). IOPCC has essentially zero correlation with CCT in normal eyes and is more accurate in post-refractive surgery eyes than traditional methods of tonometery. CRF is an indicator of the overall corneal response to the air pulse, providing a more complete characterization of the aggregate visco-elastic properties of the cornea. www.ocularresponseanalyzer.com Reichert, Inc. 3362 Walden Avenue, Depew, NY 14043 Toll-free: 888-849-8955 Tel: (716) 686-4500 Fax: (716) 686-4545 www.reichert.com I I Ocular Response Analyzer Understand the Cornea. Understand the Pressure.

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Ocular Response Analzyer® - How it Works - 2

An advanced electro-optical system monitors the curvature of the cornea throughout the deformation process, taking 400 Elastic materials are those for which strain (deformation) is directly proportional to stress (applied force), independent of the length of time or the rate at which the force is applied. Therefore, if the elastic modulus of a structure, such as a steel beam, is known, one can easily predict the amount of force required to bend it a specific amount. data samples during the 20-millisecond measurement. Two independent pressure values are derived from the inward and outward...

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