Expression of CrebAScer\UAS.cRa under the control of Scer\GAL4GMR.PF results in eyes which are slightly rough with only minor alterations in the positions of individual ommatidia. Specification of the photoreceptors occurs normally in these animals. Expression of CrebAScer\UAS.cRa under the control of Scer\GAL4ey.PH results in a mild rough eye phenotype. In addition, a small ectopic eye is present along the ventral margin of the eye. This ectopic eye is separated from the normal eye by a small zone of head cuticle.