Figures for Course Ref 6269: Choosing the right refractive surgical option for your patient Figure 1: An example of normal corneal topography. An ideal cornea for LASIKFigure 2: An example of mild inferior steepening on corneal topography. Better treated with PRK.Figure 3: Gross inferior steepening and thinning. This is an example of keratoconus for which corneal based refractive procedures are not appropriate.