AFM images of the human cornea after laser ablation. (A) AFM image of Bowman's layer after 55 pulses. Bowman's layer is relatively smooth after the photoablation. (B) AFM image of the stroma after 320 pulses. The stromal surface becomes relatively rough after photoablation. The stromal layers can be identified. Reprinted with permission from Nógrádi A, Hopp B, Révész K, Szabó G, Bor Z, Kolozsvari L. Atomic force microscopic study of the human cornea after excimer laser keratectomy. Exp Eye Res. 2000;70:363–368. Copyright 2000 Elsevier.