Tunica vasculosa lentis refers to the vascular layer that covers the lens of the eye. There are several synonyms for this term that can be used to describe this layer of the eye. Some of the common synonyms include blood-filled capsule, vascular tunic, and vascular layer. However, it is important to note that while these terms may be used interchangeably, they do not refer to exactly the same structure. The tunica vasculosa lentis is a unique and essential component of the eye that plays a critical role in maintaining the health and function of the lens.