Table 3.

Comparison of visual function in Parkinson’s disease patients and controls (adjusted for age) ^a

Visual function measurements	PD patients ( n  = 45)	Controls( n  = 50)	Adjusted P -value
Color perception (Farnsworth-Munsell 100-Hue Test score)
TES (mean ± SD)	135.82 ± 84.78	84.26 ± 41.73	0.0001b
PES (red) (mean ± SD)	33.18 ± 26.65	20.14 ± 14.40	0.001c
PES (green) (mean ± SD)	31.04 ± 17.66	19.90 ± 13.00	0.0001b
PES (blue) (mean ± SD)	45.33 ± 30.71	29.74 ± 14.35	0.001c
PES (purple) (mean ± SD)	26.22 ± 21.74	14.48 ± 10.35	0.0001b
Stereopsis
LG (mean ± SD)	5.16 ± 2.59	7.10 ± 1.89	0.0001b
Abnormal (%)	42.2%	12.0%	0.001c

^aLG, Limited grade; PD, Parkinson’s disease; PES, Partial error score; TES, Total error score. ^bP < 0.001; ^cP < 0.05.