My right eye has a negative number in the "sphere" box, and helps with my vision. The left eye being "plano," doesn't seem to help my vision, if anything it just causes a little discomfort. After my research, "plano" means there's no change to eyesight and therefore would be pointless to pay for and wear.
Read more: Prescription for my left contact lense is: BC: 8.5, DIA 14.50, Sphere: Plano, Cylinder: -.75, Axis: 070. Is this lens necessary?