A cornea with with-the-rule astigmatism has which of the following keratometry readings?

In with-the-rule astigmatism, the cornea has its steeper curvature along the vertical meridian. This means that if you take keratometry readings, the vertical meridian will show a shorter radius of curvature (which indicates a steeper surface) compared to the horizontal meridian. This is typically seen in patients who have with-the-rule astigmatism.

In this scenario, the correct understanding of keratometry readings for with-the-rule astigmatism directly correlates with the geometric behavior of the corneal surface. The steeper vertical meridian effectively causes light rays to focus at different points along the horizontal plane compared to the vertical plane, which contributes to the astigmatic error. Thus, the alignment of the steeper curvature in the vertical meridian indicates that keratometry readings will reflect this difference, confirming that the vertical meridian is indeed steeper than the horizontal meridian.