TO STUDY RELATING WATER DRINKING TEST AND INTRA OCULAR PRESSURE IN DIFFERENT AGE GROUPS AND ITS COMPARISION

To determine the behavior of IOP in different age groups among normal populations after water drinking test for a period of time. This is a prospective study involving normal healthy individual taken from different age groups 20-50 years, with no relevant past medical and surgical history. Patients were instructed to drink 1Litre of water over a period of 5-10minutes after 8 hours of overnight fasting and the IOP was checked before drinking water and every 15minutes for 1 hour period followed by 2 hours after drinking water using schiotz tonometer. The difference in baseline IOP and IOP at 1 hour and 2 hour was evaluated among different age groups .100 patients from the age groups 20-50 years were studied .The mean baseline IOP was in the range of 12.4mmHg and the mean IOP after 1 hour was 15.3mmHg.A difference of 4-4.5 mmHg were noted in the age group of 40- 50 years .The IOP was gradually decreasing to 12.78mmHg over a period of 2 hours after WDT. The higher age group the more the rise in the IOP after WDT which concludes that as the age increases drinking litres of water over a few minutes will substantially increase the IOP, which might damage the optic nerve.