This page displays all 「FI」 in main group A61H5/00. |
HB:Handbook | ||||
CC:Concordance |
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Exercisers for the eyes | HB | CC | 4C046 | |
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Performing refraction adjustment training of the eyes | HB | CC | 4C046 | |
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.Allowing observation of marks of various sizes, e.g. Randolt ring | HB | CC | 4C046 | |
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.Allowing observation of marks or images at different distances from the eye | HB | CC | 4C046 | |
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..Using optical system | HB | CC | 4C046 | |
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.Allowing alternate observation of marks or images at far point or near point | HB | CC | 4C046 | |
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Others | HB | CC | 4C046 | |