Rebound tonometry compared with goldmann applanation tonometry in patients with corneal pathology - a reliability study
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Date
2016
Authors
Lamprecht, Johann Streicher
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Abstract
Purpose: To compare the reliability of rebound tonometry (RT) with that of Goldmann
applanation tonometry (GAT) in patients with corneal scars.
Methods: Three measurements were taken with each instrument. Instruments were
compared by determining the differences between repeat measurements, by using a nonparametric
ANOVA on repeat measurements and by calculating the coefficient of
repeatability (CR). A control group with normal corneas were examined to establish
baseline correlation, repeatability and observer proficiency.
Results: 61 eyes of 48 patients were included in the group with scarred corneas. The CR of
RT was 2.667. The CR of GAT was 4.819. RT was more reliable than GAT in patients
with corneal scars. The correlation coefficient of RT with GAT was 0.8959.
Conclusion: RT correlated well with GAT in both scarred and control subjects. RT was
more reliable than GAT in patients with corneal scars. GAT was more reliable than RT in
control patients.
Description
A research report submitted to the Faculty of Health Sciences, University of the
Witwatersrand, Johannesburg, in partial fulfilment of the requirements for the
degree of
Master of Science in Medicine in the branch of Ophthalmology
Johannesburg, November 2016