Table 2

Mean and SD of visual functional parameters in healthy controls and participants with Parkinson's disease

	Healthy controls		Parkinson's disease patients
	Mean	SD	Mean	SD	Significance (p)
VA ETDRS 100	−0.06	0.096	0.18	0.26	0.001*
VA ETDRS 2.5	0.44	0.13	0.59	0.22	0.010*
VA ETDRS 1.25	0.58	0.16	0.62	0.23	0.009*
Pelli-Robson	1.89	0.11	1.71	0.17	0.002*
CSV 1000 3 cpd	1.72	0.16	1.49	0.35	0.001*
CSV 1000 6 cpd	1.94	0.13	1.62	0.34	<0.001*
CSV 1000 12 cpd	1.62	0.17	1.26	0.41	<0.001*
CSV 1000 18 cpd	1.11	0.22	0.73	0.34	0.004*
Farnsworth AC CCI	1.11	0.22	0.73	0.34	0.851
Farnsworth C-index	1.10	0.20	1.24	0.42	0.093
Farnsworth CCI	1.07	0.12	1.14	0.24	0.110
Farnsworth Conf Angle	63.90	11.15	65.84	7.49	0.392
Farnsworth S-index	1.56	0.22	1.64	0.39	0.278
Farnsworth time	78.67	28.96	82.91	33.10	0.616
Lanthony AC CCI	1.05	0.19	1.02	0.18	0.489
Lanthony C-index	1.43	0.39	1.64	0.53	0.058
Lanthony CCI	1.30	0.23	1.44	0.37	0.066
Lanthony Conf Angle	62.31	14.74	71.91	9.25	0.002*
Lanthony S-index	1.69	0.43	1.95	0.48	0.020
Lanthony time	77.14	25.99	84.09	39.31	0.431

The asterisk indicates those values with statistical significance after Bonferroni correction for multiple tests (p<0.0125 for VA ETDRS 100, 2.50 and 1.25; p<0.0125 for Pelli-Robson and CSV 1000E measurements; p<0.0083 for Farnsworth and Lanthony tests).
AC CCI, age-corrected colour confusion index; CCI, colour confusion index; C-index, confusion index; Conf Angle, confusion angle; cpd, cycles per degree; ETDRS, Early Treatment Diabetic Retinopathy Study; PD, Parkinson's disease; S-index, scatter index; VA, visual acuity.