Specific parts of Rx. To expand on dr. Proffitt's answer, sph = sphere; if this is a negative number, the prescription is a myopic or nearsighted prescription and a positive number dictates a farsighted or hyperopic prescription. Cyl = cylinder or the amount or power of the astigmatism correction. Axis is the direction in which the astigmatism correction is placed in the glasses.
Shape of eye. These are terms used by the od or md to describe measurements of the shape of the eye. They determine your prescription. They are probably meaningless to you. Important for the dispenser of your eye wear.