Importance

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Abstract

The composite plastic lens includes an anterior plastic lens having a first corrective feature and a posterior plastic lens having a second corrective feature. The anterior and posterior lenses are joined together by an adhesive that bonds opposing, etched surfaces of those lenses. The method of making the composite plastic lens includes, in one embodiment, the steps of etching the front and rear surfaces of the posterior and anterior lenses and bonding those etched surfaces together with an adhesive. Another method of making the composite plastic lens includes heating the lenses prior to bonding them together for a time such that the posterior and anterior lenses return to their original shape and curvature.

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First Claim