power 4dA convex lens of power 4D is kept in contact with a concave lens of power 3D, the effective power of combination will be . View Solution; The power of a concave lens is 10 D and that of aThe power to be a 4th-dimensional entity. Variation of Dimensional Entity. Not to be confused with Temporal Entity. 4D Physiology Fourth Dimensional Physiology New God Physiology (Fourth