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	The Value of the Ocular Response Analyzer (ORA) in the Assessment of Ectasia Risk in LASIK Patients

> > > Frequency Doubling Perimetry

Frequency Doubling Perimetry

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Product / Vendor	Specifications	List Price

Humphrey� FDT Perimeter

Carl Zeiss Meditec, Inc.

Stimulus: WelchAllyn Frequency Doubling Technology

Test Strategies: Supra-threshold screening tests in only 40 seconds, the FDT enables efficient screening for all ...

Fixation Control: Automatically occludes the untested eye

Analysis Software: Large age-related normative database

Humphrey� Matrix Perimeter

Carl Zeiss Meditec, Inc.

Stimulus: Frequency doubled sinusoidal gratings

Test Strategies: 24-2 FDT Full Threshold, 30-2 FDT Full Threshold, N-30 FDT Full Threshold, 10-2 FDT Full Threshold, ...

Fixation Control: Video eye monitoring. Heijl-Krakau fixation method. Alternative fixation targets

Analysis Software: Glaucoma Hemifield Test (GHT)

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