Title: Correlation of intra ocular pressure, measured by 2 different tonometers
Authors: Prasanthi M, Suganya E, Ravikumar R
DOI: https://dx.doi.org/10.18535/jmscr/v7i1.100
Abstract
Background: Intraocular pressure (IOP) being an modifiable risk factor of glaucoma, has to be assessed earlier for successful identification d and treatment of glaucoma.
Objectives:
- To assess the Intra ocular pressure (IOP) using GAT and Schiotz tonometer
- To compare and correlate the GAT and Schiotz tonometer in measuring the IOP
Materials and Methods: Cross-sectional study conducted in Ophthalmology department of SSSIHMS, Andhra Pradesh for a period of 2 months.112 study participants were included in the study and their IOP was assessed using GAT and Schiotz tonometers and the readings were compared. Statistical analysis was done using Pearson correlation and Paired t test.
Results: The mean age of the participants was 53.20 ± 13.03 years. Most of them are males 66(58.9%), illiterates 50(44.7%) and they belonged to Class I socio-economic status 49(43.7%). The average intra ocular pressure was high in females than males measured using both the Goldmann applanation tonometer (GAT) and Schiotz tonometers. The difference in right eye IOP was higher than Left eye. Pearson correlation showed a moderate positive correlation between the 2 tonometric assessment, having r value of 0.577 and it was statistically significant. Paired t test inferred that the difference in the IOP readings assessed by 2 tonometers are not significant.
Conclusion: The insignificant difference between the IOP measured using 2 tonometers, proves that Schiotz tonometer is comparable with gold standard GAT in assessing the IOP, hence Schiotztonometric measurements could be considered as a screening procedure for Glaucoma.
Keywords: Schiotz tonometer,GAT,Glaucoma.
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