FIG. 1 is a front view of the eyeball accessory for a lighting device in accordance with our new design, shown in an expanded configuration;

FIG. 2 is a back view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a top perspective view thereof;

FIG. 8 is a bottom perspective view thereof;

FIG. 9 is a front view of the eyeball accessory for a lighting device shown in a collapsed configuration;

FIG. 10 is a back view thereof;

FIG. 11 is a right side view thereof;

FIG. 12 is a left side view thereof;

FIG. 13 is a top view thereof;

FIG. 14 is a bottom view thereof;

FIG. 15 is a top perspective view thereof; and,

FIG. 16 is a bottom perspective view thereof.

The broken line forming a circular region within the claimed design defines the bounds of the claimed design and forms no part thereof.