Cytokine concentrations of Basal Tears (BT), Reflex tears obtained in Sitting position (RS) and Reflex tears collected with the subject Lying (RL) in Normal Control (NC) eyes.

<p>Tears of 10 control subjects were analysed for cytokine secretion using a flow cytometry based assay. Bars indicate mean concentrations and differences are significant if *p<0.05 **p<0.001, ***p<0.0001.