Table 3.

Summary of studies of visual dysfunction in DLB

	Examples of tests	Summary of findings
Color vision	Farnsworth D-15 color arrangement [33], City University Color Vision Test [33], VPTA Color naming [33], NEVIP Color Discrimination [51]	Impaired compared to healthy controls and AD.
Contrast Sensitivity	Low contrast letter charts [33]	Impaired compared to healthy controls and AD.
Object identification and form or shape discrimination	Overlapping figures [52, 53], VPTA overlapping figures [54], VOSP object decision [33, 55], VOSP silhouette identification [55], illusory contours [54], Hooper visual organization test [56], NEVIP form discrimination [51], VOSP cube analysis [33, 55]	Impaired compared to healthy controls and AD.
Letter recognition	Complete letters [57], Fragmented/Incomplete letters [55, 57, 58]	Complete letters normal but fragmented letters impaired.
Texture identification	Real and image visual texture recognition [33]	Impaired compared to healthy controls and AD.
Size and spatial orientation	Line orientation discrimination [8, 54], contour integration [8], size discrimination [52], size and angle discrimination [53], NEVIP angle discrimination [51]	Impaired compared to healthy controls and AD.
Motion perception	Space and motion perception (dot position, motion perception, visual counting) [53], NEVIP car motion [51], DTVP position in space [33], dot motion perception [59].	Impaired compared to healthy controls and AD.
Mental rotation	Lego object rotation decision [8], block mental rotation task [60]	Impaired compared to healthy controls.
Visual search	Parallel and serial feature searches [61, 62]	Impaired compared to healthy controls and AD.

NEVIP: Newcastle Visuoperception Battery

VOSP: Visual object and space perception

VPTA: Visual Perception Tests for Agnosia

DTVP: Developmental Test of Visual Perception