OPTICAL ELEMENTS FOR POWER ADJUSTABLE SPECTACLES
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United States of America Patent
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app pub date -
May 21, 2015
filing date -
May 21, 2014
priority date (Note) -
Published
status (Latency Note)
Importance
Abstract
An optical element for use in power adjustable spectacles comprises a front lens and a back lens which can slide laterally with respect to each other to achieve a first relative position and a second relative position. The optical element may be designed to provide good optical performance for far-distance viewing and for near-distance viewing, or to provide good optical performance for near-distance viewing and for intermediate-distance viewing. In some cases, the front lens and the back lens can slide laterally with respect to each other to achieve a third relative position, and the optical element may be designed to provide good optical performance for far-distance viewing, for intermediate-distance viewing and for near-distance viewing. In all cases, the predetermined addition of the prescription is in the range of 0.50 diopters to 3.00 diopters.
First Claim
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