Top-grade quality made with all metal machanism and gears for best smoothy turning.Elegant design of butterfly-shape appearance--1.Sphere powers range: +16.75D to－19.00D, with minimum reading 0.25D or 0.12D (When +0.12D auxiliary lens or optional±0.12D lens is in use) --2.extending sphere range:+26.75D to－29.00D (When optional ±10.00D lens is in use)--3.Cylinder power range: 0 to－6.00D, with minimum reading 0.25D or 0.12D (whenauxiliary lens is in use)--4.extending cylinder range:0 to－8.00D (when－2.00D auxiliary lens is in use)--5.Astigmatic axis scale: 0 to 180° in 15° steps--6.Cross cylinder: ±0.25D, reversal type (synchronized with astigmatic axis)--7.Rotary prism: 0 to 20?D in 1?D step--8.Interpupillary adjustment: 48mm to 80mm in 1mm step (right and left synchronized)--9.Forehead rest adjustment: 16mm backward and forward--10.Convergence: The optical axes of the lenses are aligned at a distance of 400mm from the vertexes of the corneas (2mm each for right and left inward)--11.Interpupillary distance enabling convergence： 57mm to 80mm--12.Corneal distance device: 2mm forward and 5mm backward from standard plane; with scale--13.Effective field of view: 19mm--14.Weight: 5kgs--15.Size: 291—323×315×85
Trustpilot
2 months ago
2 days ago
