Code No. Item Name SO 259 Stahl A/c Caliper for measuring corneal diameter SO 260 Castroviejo Caliper, 20mm spread Straight and curved SO 45 Osher Incision Caliper for internal measurement of cataract incisions from 1 to 10mm SO 185 Keratoscope Intra-Operative Keratometer for qual- itative measurement of astigmatism SO 46 RuleĀ Stainless Steel