<prompt> Which is example of the Simple Myopic Astigmatism among the prescriptions given below:Rx sphereRx will be plano -Rx will be - sphere- - on both 90 and 180 degree axis  <response>: When eyewear prescriptions are written, they can be classified into different areas depending on the power or refractive error. There are seven categories to which prescriptions can fall: 1. Simple Hyperopia, the Rx will be sphere 2. Simple Myopia, the Rx will be - sphere 3. Simple Myopic Astigmatism, the Rx will be plano - 4. Simple Hyperopic Astigmatism, the Rx will be 5. Compound Hyperopic Astigmatism, major meridian power will be on both 90 and 180 degree axis 6. Compound Myopic Astigmatism, major meridian power will be - - on both 90 and 180 degree axis 7. Mixed Astigmatism, major meridian powers will be opposites - - on both 90 and 180 degree axis REF : AK KHURANA 7TH ED 