<prompt> What will be the prescription of spectacles in a patient having simple hypermetropia with the rule astigmatism?-2D at 180o-0.5 at 90o1D at 90o3D at 180o  <response>: Patient has Hypermetropia, hence plus lens should be used.With the rule astigmatism Vertical meridian more curved than horizontal meridian.Hence, 3D at 180o in used. 