To compare horizontal corneal diameter measurements using the Orbscan Eyemetrics function and Orbscan corneal topographer. Seventy-three eyes of 37 patients were included in the study. In all cases, the automated white-to-white WTW measurements were obtained using Orbscan by two observers. Using the Eyemetrics function, the WTW was measured manually by the same observers from limbus to limbus using the digital caliper passing through the five point corneal reflections on the Orbscan real image. The data was analyzed using SPSS software for correlation, reliability and inter-rater repeatability. The mean horizontal corneal diameter was
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The intended use is to scan, map and display the geometry of the anterior segment of the eye. Federal U. IEC restricts Class A devices to operation only by a medical professional. All terms mentioned in this book that are known to be trademarks or service marks have been. All other product names are trademarks of. Icons used throughout this Manual. The Basics. Operating System Requirements. Power On and Startup. Power Off and Shutdown. Speed Button Toolbar. Menu Headings.
Optional Modules. Examination Procedures. The Acquisition Procedure. Positioning The Patient. Acquiring The Image. Processing The Exam. Saving The Processed Exam. Closing The Exam. How to Ensure a Successful Image Capture. Data Recorder. Zyoptix System Export. Setting Up A New Exam. Fixation, Alignment And Focus. Presetting Save Options. Overriding The Preset Save Options. Manual Edit. Editing Tips. Slits Only. Opening and Displaying Eye Information. Opening An Exam.
Understanding Maps. Types Of Maps. Displaying Maps. Map Displays: Advanced. Map Overlay Options. Color Legends. Map View. Profile View Cross Section View. Specialized Maps. Angle Maps. Hemimeridian Maps. System Settings: Preferences. System Tab. Map Options Tab. Extended Map Options Tab. Default Maps Tab. Custom Menu Tab. Research And Diagnosis Tools.
Incision Overlay. Eye Metrics. Refraction Calculator. Corneal Angle Estimation. Track Eye Movement. Paraxial Eye Model. Pachymetry Stats. Surface Rotation. High Resolution Display for Software Version 2. Numeric Overlay. Data Recorder Optional Module. Archiving Patient Data. Why Archive. When To Archive. How To Archive. Retrieving Archived Exams. Power Calculator. Vertex Correction Calculator. Pachymetry Overlay. Aconic Reference Surface Method. Aconic Reference Surface Fit.
How to Register the Data Recorder Module. How to Use the Recorder. Initializing The Archive Media. Database Management. Database Structure. Exporting an Exam — Normal or Anonymous. Importing An Exam. Importing a Group of Exams. E-Mailing An Exported Exam. Sorting Exams. Deleting Exams. Exporting a Group of Exams - Normal. Exporting Groups Of Exams — Secure. Importing Multiple Exams. First Time Backup. Subsequent Backups. Restoring the Database After A Backup.
Rebuilding The Database. Special Tasks. Reprocessing Saved Images. Saving Raw Images. Reviewing Images. Converting Maps Into Slides. Batch Processing.
Removable Media Tasks. Overview Of Fitscan Tabs. Patient Information Tab. Defaults Tab.
A topography unit is a machine that takes a specialized photo of the cornea, the front transparent window of the eye. The resulting photo is a topographic map of the corneal surface, similar to satellite aerial colour-coded maps of mountains and valleys on the planet earth. This map shows the bumps and valleys on the corneal surface and is used to ensure the cornea is regular and can be treated with the laser. People with irregular types of astigmatism or corneal disorders, such as Keratoconus, may be ruled as non-candidates prior to surgery. The topography is therefore essential in determining whether or not you are a candidate for LASIK surgery. Orbscan Topography is a newer technology that not only allows your surgeon to detect these irregularities on the front surface of the cornea, but also allows mapping of the posterior corneal surface.
Comparison of Eyemetrics and Orbscan automated method to determine horizontal corneal diameter
Orbscan II and IIz Operators Manual Software 3.12 - Version 2.1