Table 1. Gross retinal morphology (values shown as mean±SEM from all (n=8) in rats.

Morphologic metric	Dark	Light	Difference
			(Dark-Light)	P value
Thickness (µm)	189±9	187±9	2±1	0.128
Extent (µm)	5110±52	5110±49	0±31	0.992
Surface area (mm2)	64.92±1.00	65.37±0.98	−0.45±0.68	0.527
Volume (mm3)	10.15±0.37	10.25±0.32	−0.09±0.23	0.699