The applanation tonometer Z-800 is an accessory appliance to the CSO SL-980 (Zeiss Design) slit lamps, and it is used to measure intra-ocular pressure.
- Measurement accuracy is extremely high, the standard deviation among single measurements is approximately ± 0,5mmHg.
- The value is expressed in mmHg and it’s read directly on the instrument.
- Scleral rigidity need not be taken into consideration because the small volume moved (0,56 mm3) increases intra-ocular pressure by only about 2,5%.
- Repetition of the measurement procedure does not reduce ocular pressure since no “massage effect” has been reported.