Fig. 1. Overexpression of Crb_intra causes a rough eye phenotype. Scanning electron micrographs of adult eyes. (A,A') Wild-type eyes show a regular, hexagonal arrangement of ommatidia. Bristles are found at alternating vertices of the hexagonal array. (B,B') sev-Gal4>UAS-crb_intra. The roughening of the eye is induced by disorganisation of the array of facets; bristles are often doubled (arrowhead) and some lenses adopt a square shape (asterisk). Anterior is towards the left and dorsal towards the top.