STANDARD LENS FOR EYE REFRACTOMETER

摘要

The present invention relates to a standard lens for an eye refractometer and, more particularly, a standard lens used for correcting an eye refractormeter which is an apparatus including a continuous or digital reading device used for measuring the difference of the refractive index of the eye. For this, provided is the standard lens whose rear side is roughly polished to attach a reticle or the standard lens whose rear side is optically polished to attach the reticle. Thereby, the focal distance of the standard lens is precisely measured.