Fig. 3

Changes in eyespot size induced by biological contact materials. N (no change), E (enlargement), or R (reduction) is indicated at the bottom right in each panel. Red arrows indicate modified parafocal elements (PFEs). Right (experimental) and left (control) posterior eyespots are enlarged below a whole butterfly image. a-c Collagen Type I. d-f Polylysine. g, h Fibronectin. i, j Gelatin. k, l Water-saturated gelatin