optometry refractor phoropter

{"cid":"91190363","title":"Elegant Design Optometric Instruments Phoropter View Tester Refractor GD8707","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/f3\/20\/1d99e7c20760196ce99dc2ce1cb3-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"KESHILONG","Model Number":"GD8707","Minimum Order Quantity":"1pcs","Delivery Time":"10-20 work days","Certification":"CE, FDA","Place of Origin":"China","Payment Terms":"L\/C, T\/T, Western Union","Supply Ability":"300pcs\/month","Color":"White","Quality":"Top-grade quality","Sphere powers":"+16.75D to-19.00D","Cylinder power range":"0 to-6.00D","Astigmatic axis scale":"0 to 180\u00b0 in 5\u00b0 steps","Cross cylinder":"\u00b10.25D","Rotary prism":"0 to 20D in 1D step","Rotary Prism":"0~20\u2206D in 1\u2206D step"}}