Accurate time interval in repeated tonometry.
OBJECTIVE
Determination of the accurate interval between the measurements in repeated tonometry.


METHODS
Two hundred-and-seventy subjects were randomly divided into 6 groups. Two successive intraocular pressure (IOP) measurements were performed with Goldmann-type applanation tonometer at different time intervals in each group. The time intervals between the two measurements were 1, 2, 3, 4, 5 and 10 minutes. The results in each group were statistically analyzed with the significance test for matched observations.


RESULTS
We recorded a statistically significant difference between the first and the second IOP measurements at 1, 3, 4 and 5-minute-intervals. The differences were not significant at 2 and 10 minute-groups.


CONCLUSIONS
The time interval between successive IOP measurements should be 2 or 10 minutes for accurate tonometry.
Recep
O F
OF
3rd Eye Clinic, Numune State Hospital, Ankara-Türkiye.
Hasiripi
H
H
Vayisoglu
E
E
Kalayci
D
D
Sarikatipoglu
H
H
D000328:Adult; D005260:Female; D006801:Humans; D007429:Intraocular Pressure; D008297:Male; D008875:Middle Aged; D012016:Reference Values; D015203:Reproducibility of Results; D013997:Time Factors; D014065:Tonometry, Ocular / Q000592:standards