Table 1. Assessment and measurement of saccades, and OCT imaging of each NPC patient, and the respective means of the control group.

ID	Age [years]	NPC disability score	Peak velocity [°/s] (number of recorded saccades) 30° rightwards clinical score		30° leftwards clinical score		20° upwards clinical score		20° downwards clinical score		Compensating corollary	Macular OCT	Peripapillary OCT
1	26	8	315 (3)	1	244 (1)	1	N.A. (0)	3	N.A. (0)	3	B, H	normal	normal
2	18	11	218 (2)	0	284 (6)	0	N.A. (0)	2	N.A. (0)	1	B	normal	N.A.
3	43	11	233 (6)	0	289 (5)	0	66 (3)	3	N.A. (0)	3	B	normal	normal
4	10	9	123 (4)	0	110 (2)	0	42 (1)	2	N.A. (0)	2	B	N.A.	N.A.
5	7	5	268 (5)	0	263 (5)	0	N.A. (0)	2	359 (3)	2	B	N.A.	N.A.
6	17	2	401 (6)	0	456 (7)	0	80 (3)	2	105 (5)	2	E	normal	normal
7	28	8	318 (4)	0	383 (7)	0	112 (1)	2	53 (1)	2	B	normal	normal
8	21	12	334 (7)	0	351 (6)	0	184 (1)	2	63 (1)	2	H	normal	normal
9	14	N.A.	318 (3)	0	263 (3)	1	N.A. (0)	3	N.A. (0)	2	none	N.A.	N.A.
10	8	6	393 (4)	0	456 (2)	0	401 (4)	0	255 (4)	0	none	normal	normal
11	18	8	0		0		2		3		none	normal	normal
12	7	N.A.	0		0		2		3		none	N.A.	N.A.
13	6	N.A.	1		1		3		3		H	N.A.	N.A.
14	14	N.A.	0		0		3		1		H	N.A.	N.A.
15	21	N.A.	0		0		0		1		B	N.A.	N.A.
16	21	8	1		1		2		3		none	N.A.	N.A.
17	20	N.A.	0		0		3		2		B	N.A.	N.A.
18	19	N.A.	0		0		3		3		B	N.A.	N.A.
Controls	33 (SD 18)	N.A.	459 (SD 67) [305–677]		451 (SD 66) [259–645]		404 (SD 74) [224–609]		378 (SD 67) [216–554]		N.A.	normal	normal

B = vertical eye movements were initiated by blinking, H = compensatory or defense head movements in vertical eye movements (either upwards, or downwards, or both), E = compensating horizontal eye movements when vertical eye movements were tested.

Clinical saccade testing: 0 = normal, 1 = slowed slightly, 2 = slowed a lot, 3 = not triggerable, 4 = not assessable.

SD = standard deviation.