Optical Lensmeter Manual Lensometer With Free Shipping**
It is manufactured in India by ACHYUT and has a model number of ACT8YH. Simple and easy scale reading system. Type Direct Scale Reading System. Vertex Power Scale 0 to +/- 20 diopter. Prism Diopter Scale 0 to 5 Prism Diopter, 1 Graduation.