Table 1

Characteristics of patients

Age		Sex		Years from diagnosis		Side of affected eye		Worst documented visual acuity		Brain MRI		Acuity on day of study			Colour vision on day of study		MRI optic nerves	VEP latency at presentation (ms)		VEP latency at follow up (ms)
Age		Sex		Years from diagnosis		Side of affected eye		Worst documented visual acuity		Brain MRI		R	L		R	L	MRI optic nerves	Affected	Unaffected	Affected	Unaffected
38	F	14	R	6/9	Normal	6/5	6/5		17/17	17/17	Abnormal (R)	119.0	108.0	101.1	97.1
49	M	13	L	6/36	Normal	6/5	6/5		17/17	16/17	Normal	114.0	112.5	103.1	101.6
31	M	0.5	L	6/18	Normal	6/5-2	6/5-2		17/17	15/17	Abnormal (L)	ND	ND	121.5	102.6
33	F	12	L	6/60	Normal	6/4	6/4		16/17	15/17	Abnormal (L)	147.0	106.0	99.6	98.6
35	M	3	L	6/24	Normal	6/5-2	6/6		16/17	15/17	Abnormal (L)	ND	ND	118.6	103.3
34	M	1	L	NPL	Normal	6/4	6/5		17/17	16/17	Normal	ND	ND	97.2	96.2
45	F	12	L	CF	Normal	6/5	6/5		17/17	15/17	Abnormal (L)	No pattern	107.0	98.1	96.6

NPL=No perception of light; CF=counting fingers; ND=not done; acuity=smallest type seen on the Snellen chart; colour vision=number of Ishihara plates correctly identified.