| abstract |
The present invention relates to the use of nanoparticles of inorganic materials (eg synthetic smectite clay) in ophthalmic and ophthalmic pharmaceutical compositions. Nanoparticles are used to modify the rheological properties of the composition to enhance the viscosity, flow properties, lubricity or other properties of the composition. The present invention relates, in particular, to providing lubricant compositions for use in the eyes and ears and to enhancing the viscosity, shear softening and lubricity of the artificial lacrimal composition. |