Severely rough eyes, some photoreceptor cells completely lack rhabdomeres, at least one rhabdomere is oriented in the wrong direction, some rhabdomeres are projected toward the pigment cells and some photoreceptor cells are dead. Heterozygotes with other class II Cpn mutations or Df(3R)P-29 have less severely rough eyes. Extra copies of Cpn can restore a more normal eye phenotype.
Class II mutation, the mutation is pleiotropic.