Table.

Cut-off point of visual acuity at which opticians, optometrists, and ophthalmologists would advise patients against driving. Values are numbers (percentages) of healthcare professionals

Snellen acuity	Optometrists and opticians (n=60)	Ophthalmologists (n=72)
6/9−2	15 (25)	6 (8)
6/10	1 (2)	4 (6)
6/12	15 (25)	19 (26)
<6/12	11 (18)	20 (28)
6/15	3 (5)	2 (3)
6/18	4 (7)	10 (14)
<6/18	4 (7)	1 (1)
Number plate chart*	4 (7)	1 (1)
Number plate outside†	3 (5)	9 (13)

^*Indoor test with simulated number plate similarly mounted to Snellen chart and subtending same angle as number plate at 20.5 m. 

^†Includes all health professionals who would only offer this advice to patients or who would actively test patients in this way.