Vt-Fb

Features:

Top-grade quality View Tester in Far East

Elegant design butterfly-shape appearance, High grade plated-film used in all optic lenses.

This deivce is applicable to ophthalmology department of hospitals and spectacle store for precision measurement of visual functions such as myopia, hyperopia, astigmatism, eyesight balance, heterophoria, stereoscopic vision and eyesight amalgamation



Specification:

Sphere power range:+16.75D to 19.00D w/minimum reading 0.25D or 0.12D

(when using +0.12D auxiliary lens or optional±0.12D lens)

Cylinder power range:0 to -6.00D, w/minimum reading 0.25D or 0.12Dï¼?auxiliary lens)

0 to -8.00D(-2.00D auxiliary lens)

Astigmatic axis scale: 0 to 180° in 5° steps

Cross cylinder:±0.25D, reversal type (synchronized with astigmatic axis)

Rotary prism:0 to 20 D in 1 D steps

P.D. adjustment:48-80mm; step 1

Forehead rest adjustment:16mm

Convergence:the optical axes of the lenses are aligned at a distance of 400mm from enable convergence=57mm to 80mm.

Corneal distance:2mm forward and 5mm backward from standard plane with scale?

Effective field of view:19mm

Product size:291-323mm*315mm*85mm

Package size:470mm*440mm*220mm

N.W./G.W.: 5kgs / 6.5kgs