Abstract: The present invention relates to a curable composition, providing, upon curing, an abrasion-resistant, transparent, antistatic coating, comprising carbon nanotubes and a binder comprising at least one epoxysilane compound, preferably an epoxyalkoxysilane, and optionally fillers such as nanoparticles of non electrically conductive oxides and/or additional binder components such as tetraethoxysilane. The invention further relates to optical articles comprising a substrate, and, starting from the substrate, an abrasion- and/or scratch-resistant coating, and an antistatic coating formed by depositing directly onto said abrasion- and/or scratch-resistant coating the above referred curable composition. The obtained optical articles exhibit antistatic properties, high optical transparency with about 91-92% of transmittance, low haze and improved abrasion resistance.

Abstract: The measurement apparatus includes: a support arranged to receive a lens; lighting element including an optical system for generating a collimated light beam directed towards the lens under measurement installed on the support; detachment elements for detaching light rays from the light beam, for detaching a localized group of at least three non-coplanar light rays grouped together about a measurement axis in a measurement cylinder of section substantially smaller than the section of the lens under measurement; acquisition elements for identifying the deflections imparted by the lens on the detached light rays and for delivering a signal representative of the deflections; and an electronic and computer system programmed to deduce from said deflections the value of the refractive characteristic of the lens at the measurement point.