Data
131,681 items of data are available, covering 127,721 participants.
Defined-instances run from 0 to 1, labelled using Instancing
2.
Average compound dataset is 1.4Kb, largest is 1.4Kb.
2 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
112,177 participants, 112,177 items
Data not meaningful for statistical summary
Instance 1 : First repeat assessment visit (2012-13)
19,504 participants, 19,504 items
Data not meaningful for statistical summary
Notes
The 400 pressure values describe pressure extered as the cornea travels inward and outward through the bi-directional applanation process. The sampling rate is 75microseconds/sample. One sample is a pressure and applanation pair. The pressure and applanation values are analog-to-digital values representing voltages levels such that 0=0.0volts and 1023=5.0 volts (approximately 4.89mV/count).
1 Related Data-Field
Field ID | Description | Relationship |
5267 | Pressure curve (left) | Field 5267 is the opposite-side complement to Current Field |