A contact 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 (501,601), which is a specific area on the interior of the front curve lens, such that it is within the meniscus cavity, along which the liquid meniscus boundary moves, said meniscus wall (501,601) comprising a general shape of a conical frustum formed in the front curve lens interior surface and bordering the meniscus formed between the saline solution and the oil and along which the meniscus moves, with the angle between the meniscus wall and the optical axis between about 30° and 50° and at least a portion of the meniscus wall (501,601) concave toward the optical axis, and further comprising two meniscus sharps (506-1,506-2;608), each meniscus sharp 2. (506-1,506-2;608) being located at an end of the meniscus wall (501,601), said sharps comprising an angular feature for containing the location of the meniscus on the meniscus wall (501,601). 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 (501,601), which is a specific area on the interior of the front curve lens, such that it is within the meniscus cavity, along which the liquid meniscus boundary moves, said meniscus wall (501,601) comprising a general shape of a conical frustum formed in the front curve lens interior surface and bordering the meniscus formed between the saline solution and the oil and along which the meniscus moves, with the angle between the meniscus wall and the optical axis between about 30° and 50° and at least a portion of the meniscus wall (501,601) concave toward the optical axis, and further comprising two meniscus sharps (506-1,506-2;608), each meniscus sharp 2. (506-1,506-2;608) being located at an end of the meniscus wall (501,601), said sharps comprising an angular feature for containing the location of the meniscus on the meniscus wall (501,601).