Table 1.

The morphometric parameters of pecten oculi in different avian species.

Animals	The numbers of pleats	Diameter of capillaries (µm) (X ± Sd)	Thickness of capillary basement membrane (µm) (X ± Sd)
Ostrich	—	20.23 ± 2.98a	2.67 ± 0.32
Duck	12	14.34 ± 2.56b	2.11 ± 0.55
Pigeon	13-14	11.78 ± 2.71b	2.24 ± 0.37
Turkey	21–22	12.58 ± 2.67b	2.08 ± 0.56
Starling	17	12.78 ± 1.50b	2.00 ± 0.32

^a-bValues within a column with no common superscripts are significantly different (P < 0.05).