photoreceptor cell R1 & axon
photoreceptor cell R2 & axon
photoreceptor cell R3 & axon
photoreceptor cell R4 & axon
photoreceptor cell R5 & axon
photoreceptor cell R6 & axon
Mid third instar larvae exhibit R cell axons that project through the presumptive lamina and enter the medulla where they terminate in a disorganised mass. Sections of adult eyes are indistinguishable from wild type. In the developing optic ganglia defects in the outer proliferation centre (OPC), lamina precursor cells (LPC) and inner proliferation centre (IPC) are present.