Comparison of intraocular pressure measurements with the Goldmann Applanation Tonometer and Perkins Tonometer

Abstract

Objective: To compare the intraocular pressure measurements with the Goldmann Applanation Tonometer and that of Perkins  Tonometer.
Design: A prospective descriptive study.
Setting: Anya Specialist Hospital, Umuahia
Subjects: One hundred consecutive consenting patients comprising of 50 males and 50 females that presented in the facility from January 2019 to June 2019were included in the study.
Results: The right eyes of 100 subjects were analysed. The mean intraocular pressure measurement by the Goldmann Applanation Tonometer was 16.36mmHg, while that for Perkins was 16.56mmHg. Analysis of the findings using linear regression analysis showed a coefficient of determination (r² ) = 0.976 which is close to 1.
Conclusion: There is no statistically significant difference between IOP readings obtained with GAT and Perkins. Perkins is a good alternative to GAT and should be used to measure and monitor IOP of patients especially those who may not be able to adapt to the GAT measurement.