Related Experiment Videos
The SCHEIE Visual Field Grading System.
Prithvi S Sankar1, Laura O'Keefe1, Daniel Choi1
1Scheie Eye Institute, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
Journal of Clinical & Experimental Ophthalmology
|September 22, 2017
Summary
The SCHEIE grading system offers a reproducible method for classifying glaucoma visual field defects. This system combines qualitative and quantitative scores, improving defect identification and standardization in research.
Area of Science:
- Ophthalmology
- Medical Imaging
Background:
- Glaucoma visual field (VF) defect grading lacks a universally accepted standard.
- Existing methods may not consistently convey both qualitative and quantitative VF defect information.
Purpose of the Study:
- To introduce the SCHEIE (Systematic Classification of Humphrey visual fields-Easy Interpretation and Evaluation) grading system.
- To provide an objective, reproducible, and easily applicable method for grading glaucomatous visual field defects for research.
Main Methods:
- The SCHEIE system integrates a qualitative score (e.g., normal, scotoma types, arcuate defects) and a quantitative score.
- The quantitative component includes the Humphrey visual field index (VFI), hemifield defect locations, and blind spot involvement.
- Non-physician graders assessed accuracy and speed using both components.
Main Results:
- Median accuracy for qualitative scores was 96.67%, and for quantitative scores was 98.75%.
- Graders spent a mean of 56 seconds for qualitative scoring and 20 seconds for quantitative scoring per visual field.
Conclusions:
- The SCHEIE system is a reproducible tool for grading glaucomatous VF defects using combined measurements.
- It aims to standardize clinical staging and enhance the identification of specific VF defect patterns.
- Future research may link specific VF loss patterns to genetic variants.