Keywords:
Accompanying forms, Definitions, Effects, Eye examination, Marking, Measuring instruments, Measuring ranges, Operational instructions, Ophthalmic optics, Ophthalmic test equipment, Ophthalmology, Optical equipment, Optical instruments, Optical measurement, Optical tests, Optics, Prismatic shape, Refractometers, Refractor heads, Specification (approval), Spherical, Tolerances (measurement), Trial frames