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[Evaluation of extensive visual field defects with computer-assisted kinetic perimetry]
U Schiefer1, J Schiller, J Paetzold
1Universitäts-Augenklinik, Abteilung für Pathophysiologie des Sehens und Neuroophthalmologie, Schleichstr. 12-16, 72076 Tübingen.
Klinische Monatsblatter Fur Augenheilkunde
|February 28, 2001
Summary
Computer-assisted kinetic perimetry offers a reliable, examiner-independent method for monitoring advanced visual field loss. This new technique provides accurate and consistent measurements for various visual field defects.
Area of Science:
- Ophthalmology
- Visual Neuroscience
Background:
- Conventional kinetic perimetry is useful for advanced scotoma but suffers from examiner dependency.
- This study aimed to assess the clinical feasibility and intraindividual scatter of computer-assisted kinetic perimetry (CAKP) for monitoring diverse advanced visual field defects.
Observation:
- Examinations utilized the Tuebingen Computer Campimeter with a background luminance of 10 cd/m².
- Manual kinetic perimetry initially estimated scotoma borders, followed by CAKP using individually adjusted vectors.
- Stimuli were presented six times along randomized vectors, with responses corrected for reaction time to assess local kinetic thresholds and dispersion.
Findings:
- Four subjects with varied advanced visual field loss (retinitis pigmentosa, vigabatrin-associated defect, glaucoma, postgeniculate defect) were studied.
- The maximal difference between manual and automated kinetic thresholds ranged from 1.7 to 5 degrees.
- Local scatter (standard deviation) of the kinetic threshold assessed by CAKP varied from 0.1 to 3.0 degrees.
Implications:
- Computer-assisted kinetic perimetry proves to be a novel, reliable, and examiner-independent method.
- It enables effective evaluation and monitoring of advanced visual field loss.
- This technology enhances the accuracy and consistency of visual field assessments.