Figure 3 of Zhang, Mol Vis 2012; 18:348-361.

Figure 3. The morphology of developing Japanese quail scleral ossicles imaged using fluorescence stereomicroscopy. A: The development of quail scleral ossicles at stages E8 to E17. B: The details of ossification, including the overlapping of adjacent ossicles. A: Scale bar: 1 mm; B: Scale bar: 0.5 mm.