What information is included in the chart?
The chart includes the following information:
Y Axis: Pupil diameter in millimetres
X Axis: Time in seconds
Left pupil and right pupil on seperate lines
2 second line refers to the flash light turning on
7 second line refers to the flash light turning off
The chart can be pinched vertically to zoom into the Y Axis. Similarly, pinching horizontally will zoom the X axis.
What does this information mean?
There are three main points of interest on the chart:
If conducting the test in the same environment as a baseline test, differences in pupil size during the first 2 seconds of the exam, compared to baseline.
The reaction time for the beginning of pupil constriction and the velocity of pupil constriction from maximum diameter to minimum diameter, during seconds 2-7 of the exam.
The recovery time of the pupil back to resting diameter, from minimum diameter to maximum diameter, during seconds 7-17 of the exam.
Note: Blinking during the exam will result in sharp dips on the chart that may interfere with these observations.
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