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Sectorial and annular quantitative area pachymetry with the Orbscan II.
Carlos G Arce1, Jaime Martiz, Juan B Alzamora
1Dept of Ophthalmology, Paulista School of Medicine, Federal University of São Paulo, Rua Expedicionários 427, Sousas, Campinas, SP 13105-008, Brazil. cgarce@mpc.com.br
Journal of Refractive Surgery (Thorofare, N.J. : 1995)
|February 3, 2007
Summary
Quantitative area pachymetry using Orbscan II provides detailed corneal thickness measurements. This preoperative evaluation aids in planning corneal surgeries like keratoplasty and intracorneal segment insertion.
Area of Science:
- Ophthalmology
- Corneal Imaging
- Surgical Planning
Background:
- Accurate corneal thickness measurement is crucial for refractive and therapeutic surgeries.
- Existing pachymetry methods may lack detailed sectorial analysis capabilities.
Purpose of the Study:
- To introduce a novel application of quantitative area pachymetry for detailed corneal analysis.
- To demonstrate the utility of the Orbscan II system for sectorial corneal measurements.
Main Methods:
- Utilizing the statistical analysis device and tools menu of Orbscan II for sectorial quantitative area pachymetry.
- Analyzing small corneal zones at the center and surrounding areas.
Main Results:
- The system can display average pachymetry for a central zone and 12 surrounding zones on a pachymetry map.
- Automated calculation of average pachymetry, standard deviation, slope, and volume for annular corneal zones is possible.
- Examination results are printable for record-keeping.
Conclusions:
- The presented method offers a simple and descriptive approach to corneal pachymetry.
- This preoperative evaluation technique can guide surgical preparation for intracorneal segments and keratoplasty.
