Patent ID: 8634145

Claim:
An optical lens comprising: a front curve lens comprising a front curve lens exterior surface and a front curve lens interior surface, wherein both said front curve lens exterior surface and said front curve lens interior surface comprise an arcuate shape; a back curve lens comprising a back curve lens interior surface and a back curve lens exterior surface, wherein both said back curve lens interior surface and the back curve lens exterior surface comprise an arcuate shape, said back curve lens positioned proximate to said front curve lens such that said front curve lens interior surface and said back curve lens interior surface form a cavity therebetween and an optical axis through said front curve lens and said back curve lens; a volume of saline solution and oil contained within the cavity formed between said front curve lens interior surface and said back curve lens interior surface, said volume of saline solution and oil comprising a meniscus therebetween; and a meniscus wall comprising a general shape of a conical frustum with at least a portion of the conical frustum concave toward the optical axis.