English

Abstract

PURPOSE :To study the reliability of non-contact tonometer and Goldman applanation tonometer at various levels of intraocular pressure. MATERIALS AND METHODS : It is a cross sectional hospital based study, conducted at Govt Regional Eye Hospital between Feb 2015 to Aug 2015 .A total 100 patients enrolled in this study Total number of males 41 and total number of females 59 included in this study shown in figure 1. Age distribution of the patients shown in figure 2. IOP was measured by NCT and GAT after explaining the procedure. The data was analyzed using SPSS software. RESULTS :The mean age of subjects was 39.9 (mean) years and the range was 21 - 70 years. The mean IOP, as taken by NCT, was 15.05mmHg ±4.08 and the range was 10- 39 mmHg. The mean IOP measurement by GAT was 14.33mmHg ±3.69 with a range of 10 - 32mmHg. The difference between the mean of the NCT and GAT reading was not found to be statistically significant (p=0.067).Pearson's correlation coefficient was determined between the two tonometers and was found to have a positive correlation of .945(p=0.0001).Bland and altman analysis show fair agreement show fair agreement between the two instruments at lower IOP range but poorer agreement at high IOP ranges