PROGRESSIVE COMPOSED LENSES Russian patent published in 2004 - IPC

Abstract RU 2238580 C2

FIELD: ophthalmology.

SUBSTANCE: progressive lenses are made by combining progressive additive and regressive surfaces. The undesirable astigmatism of the progressive surface and that of the regressive surface compensate each other.

EFFECT: enhanced quality of lenses.

17 cl

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RU 2 238 580 C2

Authors

Menezes Ehdgar V.

Dates

2004-10-20—Published

2000-02-03—Filed