Features:
1. Top-grade quality View Tester in Far East;
2. Elegant design of butterfly-shape appearance;
3. High grade plated-film used in all optic lenses;
4. This device is applicable to ophthalmology department of hospitals and spectacle stores for precision measurement of visual functions such as myopia, hyperopia, astigmatism,eyesight balance, heterophoria, stereoscopic vision and eyesight amalgamation.
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Sphere powers range |
±16.75Dto-19.00D,with minimum reading 0.25D or 0.12D |
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(when+0.12D auxiliary lens or optional±0.12D lens is in use) |
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Cylinder powers range |
0 to-6.00D,with minimum reading 0.25Dor0.12D |
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( when auxiliary lens is in use) 0 to-8.00D
( when-2.00D auxiliary lens is in use)
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Astigmatic axis scale |
0 to 180°in 5°steps |
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Cross Cylinder |
±0.25D,reversal type(synchronized with astigmatic axis) |
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Rotary prism |
0 to20D in 1D steps |
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