Superior Precison –
Repeatability and Reproducibility

The precision of a device is defined by its repeatability and reproducibility
and is a measure of independency from any user interaction. High precision
allows for the detection of a gradual IOP increase earlier in a highly refined
IOP progression analysis. Precision is even more important to monitor IOP
when several users are involved.

Repeat measurements by the same observer would be within these limits in 95 % of the measurements5

Variability of non contact tonometers (NCT) was found to be twice as high compared to contact techniques. As NCT measure only over a period of milliseconds, they are influenced by the ocular pulse.




References:

5 A. Kotecha et al. IOP Precision with the GAT, DCT and ORA;
(Ophthalmology. 2010 Apr;117(4):730–7)

Repeat measurements by different observers would be within these limits in 95 % of the measurements5

PASCAL shows less variability than the traditional Gold Standard GAT and ORA, because its semiautomatic recording is highly independent from user and environmental influences.