My doctor left one of the axis numbers blank at website http://www.eyeglassesclub.com/http://www.eyeglassesclub.com/http://www.eyeglassesclub.com/http://www.eyeglassesclub.com/http://www.eyeglassesclub.com/http://www.eyeglassesclub.com/http://www.eyeglassesclub.com/http://www.eyeglassesclub.com/http://www.eyeglassesclub.com/http://www.eyeglassesclub.com/http://www.eyeglassesclub.com/http://www.eyeglassesclub.com/http://www.eyeglassesclub.com/http://www.eyeglassesclub.com/, it won't let me leave it blank. what do I do?

If there is an value "SPH" listed in the CYL area, that means you don't have any CYL strength together with the AXIS,you could just leave them blank.