Can anyone help me understand my eye prescription?!

Question: http://i11.photobucket.com/albums/a162/o...

This is my eye prescription. I'm trying to understand what the sph stands for in the OS-CYL column. Why isn't it a number? I'm ordering glasses from ZenniOptical.com and I don't know what to put.

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Answers: http://i11.photobucket.com/albums/a162/o...

This is my eye prescription. I'm trying to understand what the sph stands for in the OS-CYL column. Why isn't it a number? I'm ordering glasses from ZenniOptical.com and I don't know what to put.

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"If there is no astigmatism, we generally write the letters DS or SPH after the first number to let the optician know that we didn

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