10 Apparatus used to manufacture optical elements, namely, instruments for locating grooves, engravings and other indicia on ophthalmic lenses, instruments for measuring the diameter of ophthalmic lenses, instruments for locating the optical center of ophthalmic lenses; Ophthalmological and optometric apparatus for the diagnosis, display, and treatment of conditions of the eye, namely, refractometers, keratometers, phoropters, ophthalmometers, topometers, topographers and aberrometers; intraocular apparatus for vision therapy correction and enhancement, namely, intraocular lenses