Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The association of maximum pupil constriction velocity with pain intensity determined by patient self-report using a validated visual analog scale (VAS). The association was statistically significant (p < 0.01). The error bars reflect the ± standard error of the mean for each point.
