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The effect of temperature on the viscosity of topical lubricants. (a) Sodium hyauronate 0.4%, (b) carboxymethylcellulose/glycerin 0.9%, (c) hypromellose 0.3%, (d) carmellose sodium 0.5%. Error bars of ±1.0% deviation have been applied and a second order best fit polynomial has been used to create best fit curves. The horizontal dotted line marks kinematic viscosity of 10 ν/mm2/s, which is the minimum viscosity required to maintain precorneal residence in man (see discussion).
