LAP OPHTHALMIC CYLINDRICAL C5 CYLINDER CONVEX -6.75-7.00
FEAT
SPECIAL FEATURES
"2-1/2 INCHES BY 3-1/4 INCHES; FLAT-BACK BASE; DESIGNED W/A CONVEX SURFACE TO GRIND A CONCAVE SURFACE; EACH LAP MARKED/MEASURED IN DIOPTER BASE CURVE/CROSS CURVE; USED BY OPTICAL TECHNICIAN IN SURFACING LENS BLANKS INTO SPECIFIC POWERED LENSES IN ORDER TO FABRICATE SPECTACLES; FOR USE IN CURRENT UA 3005,NSN 6545-00-292-9696 OPTICAL FABRICATION UNIT,FIELD UNIT,FIELD,NO. 2 BASE W/LABORATORY"