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provides the key values of spheres and cylinders needed for use with your perimeter instruments. Each set contains 28 plus and 28 minus spheres from 0.25 to 16.00 and 12 plus cylinders (or minus cylnders) from 0.25 to 5.00.

Great for field refractions at nursing homes, hospitals, schools and satellite clinics. There is no need to have a complete set next to your analyzer, nor should you have to run back and forth to your exam room to use the trial lenses from your full set. Why risk having key lenses in your pocket when you leave the office? Values marked on each lens and in silver on black for easy identification in reduced light in the box.

The footprint of this convenient reduced lens set is only 9.5" ( 24 cm) square.