Product Name: Ophthalmic Manual Phoropter Fr-02 Vision Tester Refraction Instrument metal Material Model NO.: FR-02 Certification: ISO9001, CE, FDA Usage: Optical, Photography Trademark: SHTOPVIEW Origin: Shanghai HS Code: 9018500000 Product Description Ophthalmic Manual phoropter FR-02 Vision tester Refraction Instrument metal material Black colorSphere powers range+16.75D to-19.00Dwith minimum reading 0.25D or 0.12DInterpupillary adjustment48 - 80mm in 1mm stepCylinder power range0 to-6.00D, with minimum reading 0.25D or 0.12DAstigmatic axis scale0 to 180 in 5 stepsCross cylinder0.25DProduct KeywordsTOP SALE hand phoropter Manual PhoropterForehead rest adjustment16mm backward and forwardEffective field of view19mmInterpupillary distance convergence57 - 80mmcolorblack and whiteWeight5kgs