Progressive power ophthalmic lens having wide transition corridor

A progressive power lens having a top portion for distance viewing and a bottom portion for close-up viewing, said top and bottom portions being connected by at least one corridor of continuously varying power, said power varying from the distance portion to the close-up portion, said corridor being a transition zone defined by at least two spaced generally vertical curves wherein said two spaced curves are umbilic and the portion of the lens corridor between said curves departs from zero intrinsic astigmatism, said departure being no greater than 0.50 diopters, said lens having nonumbilic areas horizontally spaced on each side of said corridor.