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Table 1 Etiology of the DBN syndrome (idiopathic cerebellar syndrome; cerebellar atrophy; CANVAS), duration of visual symptoms and visual acuity as measured by orthoptic exam (Snellen chart, CC “cum correctione”) as well as SPV in gaze straight ahead (Landolt C, SC “sin correctione”)

From: Real-time computer-based visual feedback improves visual acuity in downbeat nystagmus – a pilot study

Age/sex

Etiology

Duration of symptoms (years)

Visual acuity Snellen chart

SPV in center gaze in °/s

72/m

idiopathic

10

0.6

2.5

65/f

idiopathic

3

1

1.47

82/f

CANVAS

4

0.75

0.1

79/m

idiopathic

13

0.6

1.0

75/f

CANVAS

7

0.25

3.0

80/m

idiopathic

7

0.75

3.5

55/m

CANVAS

3

0.8

0.06

59/f

idiopathic

6

0.8

1.0

78/f

atrophy

7

1

0.8

77/f

idiopathic

3

0.58

1.0

Mean

-

6.3

0.71

1.44

SD

-

+/-3.13

+/-0.21

+/-1.18