Four-cell embryos were injected with MOs into the equatorial region of two dorsal blastomeres (80 ng each blastomere). Phenotypes were scored at stage 38. n, number of scored embryos. Embryos were scored with short axes if their length was less that 80% of that of control uninjected embryos. The eye index was measured as described in Fig. 5 legend. The data were combined from two separate experiments.