The importance and accuracy of the water drinking test and tonography

The water drinking test was performed on 122 glaucoma suspect patients using the standardized Schiotz tonometer and Goldmann applanation tonometer. Additionally, the tonography was performed on 12 glaucoma suspect patients before the water test and on 69 glaucoma suspect patients after the water test. Our results showed that the most accurate test is the applanation water test. However, the accuracy of tonography was also increased if the tonography was performed after the water drinking test. The evaluation of the water drinking test only by Schiotz tonometer was not satisfactory. By using the applanation tonometry the sensitivity of the water test could be improved by 70%.