In this paper, we present the first realisation and experimentation of a new eye tracking system using an infrared (iR) laser pointer embedded into a wireless smart contact lens. We denote this contact lens prototype as the cyclops lens, in reference to the famous hero of the X-Men comics. The full eye tracker device combines the smart contact lens and its eyewear, which provides a primary source of energy and the beam detection system. We detail the assembling and encapsulation process of the main functionalities into the contact lens and present how a gaze tracking system is achieved, compared to existing conventional eye-tracking ones. Finally, we discuss future technical improvements.

The ligand substitution reaction between Fe(CN)5H2O3- and β-Co(trien)2(pzCO2)2+ (trien = triethylenetetraammine; pzCO2 = pyrazinecarboxylate) was studied in aqueous salt and sodium dodecyl sulfate micellar solutions. In homogeneus aqueous solutions, an increase in the concentration of the background electrolytes resulted in a decrease in the observed rate constant. This was explained by considering the influence of the salts on the activity coefficients of the participants in the reaction using a Guggenheim−Guntleberg-type equation. In sodium dodecyl sulfate micellar solutions, the effect of the variation of the surfactant concentration operated mainly through its influence on the approaching process between the two oppositely charged reactants. When the surfactant concentration is high enough to ensure the total incorporation of the Co(III) complex molecules into the micellar pseudophase, the decrease in the electrical component of the free energy of activation (controlled by changes in the interfacial e...

It can be deduced from a comparison of the salt effects in the reactions of persulfate with thiosulfate, of bromoacetate with thiosulfate, and of ethyl oxalate with hydroxide ions that the first of these reactions is subject to nonelectrostatic effects of great magnitude. The differences in the relative effects of the alkaline and of the alkaline-earth ions in the three reactions is attributed to the different hydration properties of the ion pairs in each case. In particular, it is concluded that the ion pairs with the hydroxide ion are formed without the intervention of water of hydration. The specific salt effects of various organic ions on the reaction between persulfate and thiosulfate are discussed on the basis of the mechanism of the nonelectrostatic effects.