shaped tapered off area 13 a diagrammatic cross section of the lens of fig1 through line 2 2 is shown in fig2 the illustrated lens has a sphercial base curve or convex inner surface including edge bevel 16 and an outer toric surface fig2 additionally shows by means of shaded area 14 the original prismatic base of the lens before cutting bevel 13 whereupon the material in shaded area 14 is removed to reduce the edge thickness of the lens in that region referring again to fig1 the orientation of the lens is indicated by reference to degrees as illustrated the lenses illustrated and described herein are characterized by having the prism ballast centered at 270 degrees as indicated by the symbol u03b4 the axis of the cylindrical correction is indicated by the reference symbol x as illustrated in fig1 the cylindrical axis of the lens is 90 degrees referring now to fig3 there is diagrammatic illustration of the edge thickness profile proceeding around the lens of fig1 from a to a 39 as a result of incorporating prismatic ballast into the lens the thickness of the edge increases slightly in proceeding from a to b and from a 39 to b 39 as a result.