A method according to claim 16 wherein a term is included in the merit function that represents the cosmetics of the lens, a modified merit function being defined by: M * = M + ?? ?? ??? ?? 2 ??? ( V ?? ??? ??? r 2 ) 2 where M represents any merit function, ???? denotes the number of sample eye rotations ?? considered in M, r is a specified lens radius, V is the lens volume out to the radius r, an