Viscosity η (Pa) of the positive control (long-lasting formula), the negative control (formula that migrates very quickly into the eyelids) and the new formula based on the mixture of jojoba esters (75/25% butter A/butter B w/w) obtained for (a) a fixed shear rate of 0.01 s⁻¹ for 10 minutes at 35 °C and for (b) a range of shear rates from 0.1 s⁻¹ to 10⁻⁵ s⁻¹ at 35 °C. Results obtained after application of the Rabinowicz correction.