In one aspect, the present invention provides a tWo-eLement ophthalmic lens in which a lateral shift of the elements relative to one another can cause a variation not only in a spherical power provided by the lens but also in spherical aberration exhibited by that lens. In some implementations, the thickness profiles of the two elements are designed such that the variation in spherical aberration is positively correlated with that of the spherical power of the lens.在一觀點，本發明提供一種二元件之眼用透鏡，在其中，該等元件相對於彼此之側向位移不僅可以於由該透鏡所提供之球面功率，且亦於由該透鏡所展現之球面像差造成變化。在某些實施，該二元件之厚度剖面係如此設計以致於在球面像差之變化係正向地相關於該透鏡之球面功率之變化。
