A lens of a vehicle light assembly includes a front curved light exit surface, a rear light entry surface spaced apart from the curved light exit surface along an optical axis and convexed rearwardly, left and right reflection surfaces connected to the light entry surface, and left and right flank surfaces connected to the left and right reflection surfaces and to the curved light exit surface. A minimum distance of each flank surface from the optical axis is greater than a maximum distance of each reflection surface from the optical axis.