There are many factors that influence ones tolerance of pain, this is well understood, however the exact mechanisms of pain tolerance and determinants of your personal capacity to endure pain is still unclear. However researchers from the University of Pittsburgh School Of Medicine have noticed a potential determinant of a persons pain threshold. Lead researcher Inna Belfer, MD, PhD performed a study that looked at (no pun intended) correlations between peoples eye colour and pain tolerance. She explains that ‘human pain is correlated with multiple factors like gender, age and hair colour’ meaning a persons eye colour could well give you some insight into their capacity to tolerate pain.
The findings of Dr Belfer’s study was summarised as follows:
"Researchers have found that red hair is associated with resistance to anesthetics and also to increased anxiety and darker eye color has been reportedly found to correlate with increased physiologic reactivity and drug-induced pupil dilation."
This was based on a relatively small subject number (people tested in the study) but was stringently governed and moderated. Researchers noticed that darker eyed women experienced more pain during pregnancy, were tolerance of heat pain and were more likely to be depressed as a result of their pain, and exhibited greater anxiety and sleep disturbance compared to ladies with a lighter eye colour.
Maybe they’re on to something, so let’s watch this space (pun intended).
Medscape, (2014). Does eye colour predict response to pain? Retrieved 15th May, 2014, from discount supplements