Fig. 2
From: The pupillary light reflex (PLR) as a marker for the ability to work or drive – a feasibility study
Illustration of the different PLR parameters in the PLR plot. The upper illustration (A) describes the pupil diameter over time and the corresponding parameters that could be estimated form the curve: initial diameter (dinit), latency (∆tlat), contraction velocity (ϑcon), quarter dilatation velocity (ϑ1/4dil), half dilatation time (∆t1/2) and line integral (L(0.3500)). The lower picture (B) illustrates the acceleration of the pupil with its corresponding parameter (∆ta)