medical apparatus and instruments, namely, ophthalmological instruments, namely, manual ophthalmic surgical instruments; ophthalmometers, artificial eyes, artificial skin for surgical purposes, intraocular prostheses, intraocular lenses for surgical implantation, surgical implants made of artificial materials, intraocular prostheses lenses for surgical implantation; testing apparatus for medical purposes, namely, intraocular pressure measuring devices, corneal radius measuring devices