Eye charts for medical examination use; Eye testing machines and apparatus; Medical instruments for use in optometry; Microscopes for surgical operations; Ophthalmometers; Ophthalmoscopes; Optometric instruments for locating the optical center of ophthalmic lenses; Optometric instruments, namely, instruments for measuring the diameter of ophthalmic lenses; Surgical apparatus and instruments for use in ophthalmic surgery; Surgical apparatus for use in ophthalmic surgery