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Ocular Response Analyzer

Ocular Response Analyzer

You have never been this close to find out corneal biomechanics.
Ocular Response Analyzer ,above all the other features, allows doctors to classify various corneal parameters based on biomechanical characteristics of cornea. This device enables one to understand the nature of cornea by measuring corneal biomechanics and intraocular pressure at once.

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* Allows a better determination of keratoconus
* Provides higher reliability of assesment for the patients who will likely be subjected to refractive surgery
* Gives sharper IOP measurements, especially for the patient who was subjected to refractive surgery 
* New tool to identify risk of glaucoma progression
* New tool to determine glaucoma patients treatment needs and effectiveness of this treatment
 
 
According to many research, CH (Corneal hysteresis) and CRF (Corneal Resistance Factor) values show significant reductions after refractive surgery. These parametersprovides a more complete description of corneal biomechanics c ompared to the CCT and topography alone.  To know the CH and CRF parameters preoperatively allows to the determination of the people who is under  the risk of postoperative complications such as ectasia.
 


 
What is Corneal Hysteresis?
 
Hysteresis is a property of physical systems that do not instantly follow the forces applied to them, but react slowly, or do not return completely to their original state. Corneal Hysteresis is the difference in the inward and outward pressure values obtained during the dynamic bi-directional applanation process employed by the Ocular Response Analyzer, as a result of viscous damping in the cornea.
 

 
 
Measurement of this parameter also allows to calculate corneal resistance factor (CRF) which gives information about total visco-elastic response of the cornea.
 
Ocular Response Analyzer's Corneal-Compensated Intraocular Pressure (IOPcc) takes biomechanical properties into consideration. IOPcc has been shown to be less dependent on corneal properties than other methods of tonometry.The instrument's unique ability to simultaneously provide a Goldmann-correlated IOP measurement (IOPG) and IOPcc provides clinicians with a better understanding of patient tonometry values. Together with CH measurements, this parameter allows clinicians to identify risk of glaucoma and its progression.
 
Recent studies showed that the people classified in normal eye function group  via NCT (non-contact tonometer) or GAT (Goldmann applanation tonometry) has actually been diagnosed as"Normal Tension Glaucoma" patient when the corneal biomechanic information was obtained via ORA (Ocular Response Analyser).
 
More information about ORA: http://www.ocularresponseanalyzer.com