Table 3.

Average pulsation of retinal vasculature with visualization at different cardiac cycle points for 12 subjects.

	Cardiac cycle point	Mean (SD) (μm)	P value†	Variations* (μm)	Max–Min† (μm)
Individual arterioles caliber	1	99.0 (9.5)		Ref.
	2	101.5 (10.0)		2.5
	3	98.2 (9.6)		0.8
	4	98.6 (9.7)	0.001	0.4	3.3
	5	98.2 (9.8)		0.8
	6	99.3 (11.1)		0.3
	7	100.4 (9.7)		1.4
	8	100.6 (8.4)		1.6
Individual venules caliber	1	109.4 (14.5)		Ref.
	2	108.6 (15.0)		0.8
	3	113.3 (16.1)		3.9
	4	114.3 (14.5)	<0.001	4.9	6.6
	5	113.6 (17.3)		4.2
	6	115.2 (15.7)		5.8
	7	110.9 (16.1)		1.5
	8	112.7 (17.2)		3.3

*Absolute value compared to cycle point 1; ^†overall P value for variations.