Probable transcription factor that is required for normal development of the outer retina. Homodimer. Binds DNA as a dimer (By similarity). Expressed in the developing eye and CNS prior to neuronal differentiation. First detected at around 18 hours post-fertilization (hpf) in the eye primordia and brain. At 24-42 hpf, expressed in most cells of the developing eyes, CNS and ears. At 48 hpf, also detected in the optic nerve and tracts. By 56 hpf, levels are barely detectable. Belongs to the NRF1/Ewg family.