Contact Lens Check and Keratometer Calibrator dual-purpose device produces fast, accurate, reproducible results. The 42.50 diopter stainless steel ball allows you to easily calibrate your Keratometer. The contact lens holder prevents expensive mistakes by allowing you to quickly confirm base curves when ordering replacement contact lenses.
Also allows you to check for warpage or any changes to the base curve. Performs just as accurate as a radiuscope yet more economical and quicker. To measure the base curve of hard lenses, simply place the RGP lens in the depression well using contact lens wetting solution, The device easily mounts and dismounts for moving from lane to lane.